Sant Uk.10te% Regulatory News (SAN)

Santander UK plc

Announcement of Annual Report for the Year Ended 31 December 2018

Santander UK plc is pleased to announce the publication of its Annual Report for the Year Ended 31 December 2018 (the 'Annual Report'), in compliance with Disclosure Guidance & Transparency Rule (DTR) 4.1.

Please click here to view the full 2018 Annual Report and Accounts of Santander UK plc: 

http://www.rns-pdf.londonstockexchange.com/rns/2023R_1-2019-2-26.pdf

Please click here to view Santander UK plc's Glossary of Financial Services Industry Terms to be read in conjunction with the Santander UK plc's 2018 Annual Report and Accounts: 

http://www.rns-pdf.londonstockexchange.com/rns/2023R_2-2019-2-26.pdf

The Annual Report may also be accessed via the Investor Relations section of Santander UK's website at www.aboutsantander.co.uk. A copy of the Annual Report has also been submitted to the National Storage Mechanism.

The following information is extracted from the Annual Report.

This announcement constitutes the material required by DTR 6.3.5 to be communicated to the media in unedited full text through a Regulatory Information Service. This material is not a substitute for reading the Annual Report in full.

Form 20-F

It should be noted that the financial results for 2018 will be included in the Annual Report on Form 20-F that will be filed with the SEC and will be available online at www.sec.gov.

Forward- Looking Statements

Santander UK plc and its ultimate parent Banco Santander SA caution that this announcement may contain forward-looking statements. Such forward looking-statements are found in various places throughout this announcement with respect to the financial condition, results, operations and business including future business development and economic performance.

These statements and forecasts involve risk and uncertainty because they relate to events and depend upon circumstances that will occur in the future. There are a number of factors that could cause actual results or developments to differ materially from those expressed or implied by these forward-looking statements and forecasts.

No statement financial or otherwise should be construed as a profit forecast.

Statement of Directors' responsibilities

The Directors are responsible for preparing the Annual Report and the financial statements in accordance with applicable law and regulations. Company law requires the Directors to prepare financial statements for each financial year. Under that law, the Directors have prepared the Santander UK group and Company financial statements in accordance with IFRS as adopted by the EU.

In preparing the financial statements, the Directors have also elected to comply with IFRS as issued by the IASB. Under company law, the Directors must not approve the financial statements unless they are satisfied that they give a true and fair view of the state of affairs of the Santander UK group and the Company and of the profit or loss of the Santander UK group and the Company for that period.

In preparing the financial statements, the Directors are required to:

- Select suitable accounting policies and then apply them consistently

- State whether applicable IFRS as adopted by the EU and IFRS issued by the IASB have been followed for the Santander UK group and Company financial statements, subject to any material departures disclosed and explained in the financial statements

- Make judgements and accounting estimates that are reasonable and prudent

- Prepare the financial statements on the going concern basis unless it is inappropriate to presume that the Santander UK group and company will continue in business.

The Directors are also responsible for safeguarding the assets of the Santander UK group and the Company, and hence for taking reasonable steps for the prevention and detection of fraud and other irregularities.

The Directors are responsible for keeping adequate accounting records that are sufficient to show and explain the Santander UK group's and the Company's transactions and disclose with reasonable accuracy at any time the financial position of the Santander UK group and the Company, and enable them to ensure that the financial statements comply with the UK Companies Act 2006 and, as regards the Santander UK group financial statements, Article 4 of the IAS Regulation.

The Directors are responsible for the integrity and maintenance of Santander UK's website.

Legislation in the UK governing the preparation and dissemination of financial statements may differ from legislation in other jurisdictions.

Having taken into account all the matters considered by the Board and brought to its attention during the year, the Directors are satisfied that the Annual Report taken as a whole is fair, balanced and understandable, and provides the information necessary to assess Santander UK's position and performance, business model and strategy.

Each of the Directors at the date of approval of this report confirms, to the best of their knowledge, that:

- The financial statements, prepared in accordance with IFRS, as adopted by the EU, give a true and fair view of the assets, liabilities, financial position and profit or loss of the Company and the Santander UK group

- The management report, which is incorporated into the Directors' report, includes a fair review of the development and performance of the business and the position of the Company and the Santander UK group, together with a description of the principal risks and uncertainties they face.

Principal risks

Risk is any uncertainty about us being able to achieve our business objectives. It can be split into a set of key risk types, each of which could affect our results and our financial resources. Enterprise wide risk is the aggregate view of all the key risk types described below:

Financial review

SUMMARISED CONSOLIDATED INCOME STATEMENT

A more detailed Consolidated Income Statement is contained in the Consolidated Financial Statements.

2018 compared to 2017

As described in more detail below, and in Note 43 to the Consolidated Financial Statements, the financial results reflect the changes in our statutory perimeter that we made in the third quarter of 2018, following the ring-fence transfers to Banco Santander London Branch. Prior periods have not been restated. Profit before tax was down 15% at £1,545m. By income statement line, the movements were:

Critical factors affecting results

The preparation of our Consolidated Financial Statements requires management to make estimates and judgements that affect the reported amount of assets and liabilities at the balance sheet date and the reported amount of income and expenses during the reporting period. Management evaluates its estimates and judgements on an ongoing basis. Management bases its estimates and judgements on historical experience and other factors believed to be reasonable under the circumstances. Actual results may differ from these estimates under different assumptions or conditions.

Estimates and judgements that are considered important to the portrayal of our financial condition including, where applicable, quantification of the effects of reasonably possible ranges of such estimates are set out in 'Critical Judgements and Accounting Estimates' in Note 1 to the Consolidated Financial Statements.

The rest of this section contains a summary of the results, and commentary thereon, by income statement line item for each segment.

Basis of results presentation

The segmental information in this Annual Report reflects the reporting structure in place at the reporting date in accordance with which the segmental information in Note 2 to the Consolidated Financial Statements has been presented.

The basis of presentation in this Annual Report has been changed, and the prior periods restated, to report our Jersey and Isle of Man branches in Corporate Centre rather than in Retail Banking as in previous years, as a result of their transfer from Santander UK plc to ANTS in December 2018 as part of the implementation of ring-fencing.

PROFIT BEFORE TAX BY SEGMENT

RETAIL BANKING

Retail Banking offers a wide range of products and financial services to individuals and small businesses through a network of branches and ATMs, as well as through telephony, digital and intermediary channels. Retail Banking includes business banking customers, small businesses with an annual turnover up to £6.5m, and Santander Consumer Finance, predominantly a vehicle finance business.

Summarised income statement

2018 compared to 2017

Profit before tax decreased by £170m to £1,481m in 2018 (2017: £1,651m). By income statement line, the movements were:

Customer balances

2018 compared to 2017

CORPORATE & COMMERCIAL BANKING

To better align reporting to the nature of the business segment following ring-fence transfers, Commercial Banking has been re-branded as Corporate & Commercial Banking. Corporate & Commercial Banking covers businesses with an annual turnover of £-6.5m to £500m. Corporate & Commercial Banking offers a wide range of products and financial services provided by relationship teams that are based in a network of regional CBCs and through telephony and digital channels.

Summarised income statement

2018 compared to 2017

Profit before tax increased by £16m to £190m in 2018 (2017: £174m). By income statement line, the movements were:

Customer balances

2018 compared to 2017

Corporate & investment banking

As part of a rebrand across the Banco Santander group, Global Corporate Banking (the UK segment of Santander Global Corporate Banking) has been branded as Corporate & Investment Banking (CIB). CIB services corporate clients with an annual turnover of £500m and above. CIB clients require specially tailored solutions and value-added services due to their size, complexity and sophistication. We provide these clients with products to manage currency fluctuations, protect against interest rate risk, and arrange capital markets finance and specialist trade finance solutions, as well as providing support to the rest of Santander UK's business segments.

Summarised income statement

2018 compared to 2017

As described in more detail below, and in Note 43 to the Consolidated Financial Statements, the financial results reflect the changes in our statutory perimeter that we made in the third quarter of 2018, following the ring-fence transfers to Banco Santander London Branch which principally impacted Corporate & Investment Banking. Prior periods have not been restated. Profit before tax increased by £108m to £57m in 2018 (2017: £51m loss). By income statement line, the movements were:

Customer balances

2018 compared to 2017

CORPORATE CENTRE

Corporate Centre mainly includes the treasury, non-core corporate and legacy portfolios, including Crown Dependencies. Corporate Centre is also responsible for managing capital and funding, balance sheet composition, structure, pension and strategic liquidity risk. To enable a more targeted and strategically aligned apportionment of capital and other resources, revenues and costs incurred in Corporate Centre are allocated to the three business segments. The non-core corporate and legacy portfolios are being run-down and/or managed for value.

Summarised income statement

2018 compared to 2017

Corporate Centre made a loss before tax of £183m in 2018 (2017: £43m profit). By income statement line, the movements were:

Customer balances

2018 compared to 2017

Balance sheet review

SUMMARISED CONSOLIDATED BALANCE SHEET

A more detailed Consolidated Balance Sheet is contained in the Consolidated Financial Statements.

2018 compared to 2017

As described in more detail below, and in Note 43 to the Consolidated Financial Statements, the balances at 31 December 2018 excluded assets and liabilities transferred outside of the Santander UK group as part of ring-fencing implementation.

Assets

Cash and balances at central banks

Cash and balances at central banks decreased by 40% to £19,747m at 31 December 2018 (2017: £32,771m) due to no balances being held with US Federal Reserve following the closure of the ANTS branch office in the US, and lower balances with the Bank of England, in accordance with our liquidity and funding plans. In addition, cash and balances at central banks decreased due to the sale of the business of the Jersey and Isle of Man branches of Santander UK plc to ANTS.

Trading assets

Trading assets decreased to £nil at 31 December 2018 (2017: £30,555m). This reflected the run-down or transfer of our trading business, including the transfer of our gilt-edged market making business to Banco Santander London Branch, as part of our transition to our ring-fenced model.

Derivative financial instruments - assets

Derivative assets decreased by 74% to £5,259m at 31 December 2018 (2017: £19,942m). This mainly related to the transfer of the prohibited part of our derivatives business with certain corporates and financial institutions to Banco Santander London Branch as part of the transition to our ring-fenced model.

Other financial assets at fair value through profit or loss

Other financial assets at fair value through profit or loss increased to £5,617m at 31 December 2018 (2017: £2,096m), due to the following:

Loans and advances to customers

Loans and advances to customers at amortised cost increased slightly to £201,289m at 31 December 2018 (2017: £199,340m). This was mainly due to:

Reverse repurchase agreements - non trading

Non trading reverse repurchase agreements increased to £21,127m at 31 December 2018 (2017: £2,614m), which reflected the revised classification of the majority of our permitted non trading reverse repurchase agreements at amortised cost, in line with our ring-fenced business model for managing these assets as part of our overall funding and liquidity plans.

Other financial assets at amortised cost

On adoption of IFRS 9, the Santander UK group split the 'financial investments' balance sheet line item between 'other financial assets at amortised cost' and 'financial assets at FVOCI. This aligned the balance sheet line items to the IFRS 9 accounting classifications and provides a clearer understanding of our financial position. At 1 January 2018, this resulted in £7,776m of other financial assets at amortised cost being re-classified from financial investments measured at amortised cost. When compared to 1 January 2018, the balance reduced slightly to £7,229m at 31 December 2018.

Financial assets at fair value through other comprehensive income

At 1 January 2018 and on adoption of IFRS 9, financial investments of £8,743m that were previously measured at available-for-sale under IAS 39 were re-classified at FVOCI. When compared to 1 January 2018, the balance increased to £13,302m at 31 December 2018 due to higher volumes of short-dated bonds within the eligible liquidity pool.

Retirement benefit assets

Retirement benefit assets increased by 88% to £842m at 31 December 2018 (2017: £449m). This was mainly due to actuarial gains in the year driven by rising corporate bond yields, partially offset by a higher assumed inflation rate, which when combined reduced the value placed on Scheme liabilities.

Liabilities

Trading liabilities

Trading liabilities decreased to £nil at 31 December 2018 (2017: £31,109m). This reflected the run-down or transfer of the majority of our trading business, including the transfer of our gilt-edged market making business to Banco Santander London Branch, as part of our transition to our ring-fenced model.

Derivative financial instruments - liabilities

Derivative liabilities decreased to £1,369m at 31 December 2018 (2017: £17,613m). This mainly related to the transfer of the prohibited part of our derivatives business with certain corporates and financial institutions to Banco Santander London Branch, as part of the transition to our ring-fenced model.

Other financial liabilities at fair value through profit or loss

Other financial liabilities at fair value through profit or loss increased to £6,286m at 31 December 2018 (2017: £2,315m), due to the classification of £1.7bn of non-trading repurchase agreements at FVTPL to minimise accounting mismatches during our ring-fencing transition, and also higher structured deposit balances following the establishment of a new credit protection vehicle in the year.

Deposits by customers

Deposits by customers at amortised cost decreased by 3% to £178,090m at 31 December 2018 (2017: £183,648m), with lower corporate deposits and management pricing actions driving a reduction in retail savings products. In addition, £4.8bn of customer deposits were transferred as part of the sale of the business of the Jersey and Isle of Man branches of Santander UK plc to ANTS. This was partially offset by a £0.9bn increase in personal current account balances.

Deposits by banks

Deposits by banks increased by 36% to £17,221m at 31 December 2018 (2017: £12,708m), driven by further drawdowns of the Term Funding Scheme with the Bank of England, and higher deposits held as collateral.

Repurchase agreements - non trading

Non trading repurchase agreements increased to £10,910m at 31 December 2018 (2017: £1,076m), which reflected the revised classification of the majority of our permitted non trading repurchase agreements at amortised cost, in line with our ring-fenced business model for managing these liabilities as part of our overall funding and liquidity plans.

Debt securities in issue

Debt securities in issue increased by 10% to £46,692m at 31 December 2018 (2017: £42,633m) reflecting the pre-funding of our 2019 requirements.

Retirement benefit obligations

Retirement benefit obligations decreased by 60% to £114m at 31 December 2018 (2017: £286m). This was principally due to actuarial gains in the year driven by widening credit spreads on the discount rate used to value scheme liabilities.

Equity

Total shareholders' equity

Total shareholders' equity decreased by 2% to £15,758m at 31 December 2018 (2017: £16,053m). Total comprehensive income in the period was offset by dividend payments, including £668m associated with ring-fencing transfers to Banco Santander London Branch. In addition, as part of a capital management exercise, Santander UK plc purchased and redeemed £290m of 6.475% Perpetual Capital securities.

Cash flows

SUMMARISED CONSOLIDATED CASH FLOW STATEMENT

A more detailed Consolidated Cash Flow Statement is contained in the Consolidated Financial Statements.

The major activities and transactions that affected cash flows during 2018 and 2017 were as follows:

In 2018, the net cash outflows from operating activities of £15,405m resulted from net cash outflows relating to trading and derivative assets and liabilities. The net cash outflows from investing activities of £3,682m mainly reflecting purchases of financial investments in the year as part of normal liquidity management. The net cash inflows from financing activities of £2,730m reflected the net inflows from debt securities following the pre-funding of our 2019 requirements. This was offset by payments of dividends on ordinary shares, preference shares, other equity instruments and non-controlling interests. Cash and cash equivalents decreased by £16,357m principally from the decrease in cash held at central banks.

In 2017, the net cash inflows from operating activities of £23,976m resulted from the increase in trading balances, increased customer lending and customer savings and deposits from other banks. The net cash inflows from investing activities of £816m mainly reflected sale and redemption of financial investments offset by purchases of property, plant and equipment and intangible assets. The net cash outflows from financing activities of £7,637m principally reflected the repayment of debt securities maturing in the year of £13,763 offset by new issues of debt securities of £6,645m, the payment of interim dividends on ordinary shares, preference shares, other equity instruments and non-controlling interests of £1,000m. Cash and cash equivalents increased by £17,155m principally from the increase in cash and balances at central banks, which is held as part of the liquidity pool. This increase was mainly due to a change in the mix of assets held for liquidity purposes as part of normal portfolio management activity.

2018 business development highlights

Retail Banking

Corporate & Commercial Banking

Corporate & Investment Banking

Financial statements

Consolidated Income Statement

For the years ended 31 December

Consolidated Statement of Comprehensive Income

For the years ended 31 December

Consolidated Balance Sheet

At 31 December

The accompanying Notes to the Financial Statements form an integral part of these Consolidated Financial Statements.

The Financial Statements were approved and authorised for issue by the Board on 26 February 2019 and signed on its behalf by:

Company Registered Number: 2294747

Consolidated Cash Flow Statement

For the years ended 31 December

Consolidated Statement of Changes in Equity

For the years ended 31 December

1. ACCOUNTING policies

These financial statements are prepared for Santander UK plc (the Company) and the Santander UK plc group (the Santander UK group) under the UK Companies Act 2006. The principal activity of the Santander UK group is the provision of an extensive range of personal financial services, and a wide range of banking and financial services to personal, business and corporate customers. Santander UK plc is a public company, limited by shares and incorporated in England and Wales having a registered office at 2 Triton Square, Regent's Place, London, NW1 3AN, phone number 0870-607-6000. It is an operating company undertaking banking and financial services transactions.

Basis of preparation

These financial statements incorporate the financial statements of the Company and entities controlled by the Company (its subsidiaries) made up to 31 December each year. The Consolidated Financial Statements have been prepared on the going concern basis using the historical cost convention, except for financial assets and liabilities that have been measured at fair value. An assessment of the appropriateness of the adoption of the going concern basis of accounting is disclosed in the statement of going concern in the Directors' Report.

Compliance with International Financial Reporting Standards

The Santander UK group Consolidated Financial Statements have been prepared in accordance with IFRSs as issued by the IASB, including interpretations issued by the IFRS Interpretations Committee (IFRS IC) of the IASB (together IFRS). The Santander UK group has also complied with its legal obligation to comply with IFRSs as adopted by the European Union as there are no applicable differences between the two frameworks for the periods presented.

The Company financial statements have been prepared in accordance with IFRSs as adopted by the European Union and as applied in accordance with the provision of the UK Companies Act 2006. Disclosures required by IFRS 7 'Financial Instruments: Disclosure' relating to the nature and extent of risks arising from financial instruments, and IAS 1 'Presentation of Financial Statements' relating to objectives, policies and processes for managing capital, can be found in the Risk review. Those disclosures form an integral part of these financial statements.

Recent accounting developments

On 1 January 2018, the Santander UK group adopted IFRS 9 'Financial Instruments' (IFRS 9) and IFRS 15 'Revenue from Contracts with Customers' (IFRS 15). The new or revised accounting policies are set out below.

The impact of applying IFRS 9 is disclosed in Note 44. The accounting policy changes for IFRS 9, set out below, have been applied from 1 January 2018. Comparatives have not been restated. As a result of the change from IAS 39 to IFRS 9, some disclosures presented in respect of certain financial assets are not comparable because their classification may have changed between the two standards. This means that some IFRS 9 disclosures are not directly comparable and some disclosures that relate to information presented on an IAS 39 basis are no longer relevant in the current period. As explained in Note 44, the classification and measurement changes to financial assets that arose on adoption of IFRS 9 have been aligned to the presentation in the balance sheet. The Santander UK group decided to continue adopting IAS 39 hedge accounting and consequently there have been no changes to the hedge accounting policies and practices following the adoption of IFRS 9. However, additional hedge accounting disclosure requirements of IFRS 7 'Financial Instruments: Disclosures' (IFRS 7) have been included in these financial statements.

In addition, non-trading repurchase agreements and non-trading reverse repurchase agreements that are held at amortised cost are now presented as separate lines in the balance sheet. Previously, non-trading reverse repurchase agreements were included in 'Loans and advances to banks' and 'Loans and advances to customers', and non-trading repurchase agreements were included in 'Deposits by banks'. The new presentation, which is considered to be more relevant to an understanding of our financial position, was adopted with effect from 1 January 2018, and comparatives are re-presented accordingly. For the Santander UK group, the impact of this re-presentation on the balance sheet at 1 January 2017 was to decrease loans and advances to banks by £1,462m, increasing non trading reverse repurchase agreements by the same amount, and to decrease deposits by banks by £2,384m, increasing non trading repurchase agreements by the same amount. For the Company, the impact of this re-presentation on the balance sheet at 1 January 2017 was to decrease loans and advances to banks by £476m, increasing non trading reverse repurchase agreements by the same amount, and to decrease deposits by banks by £2,933m, and increase non trading repurchase agreements by the same amount.

The application of IFRS 15 had no material impact on the Santander UK group as there were no significant changes in the recognition of in-scope income. The accounting policy changes for IFRS 15 are set out in the Revenue recognition policy below.

Future accounting developments

At 31 December 2018, the Santander UK group has not yet adopted the following significant new or revised standards and interpretations, and amendments thereto, which have been issued but which are not yet effective for the Santander UK group:

Comparative information

As required by US public company reporting requirements, these financial statements include two years of comparative information for the consolidated income statement, consolidated statement of comprehensive income, consolidated statement of changes in equity, consolidated statement of cash flows and related Notes.

Consolidation

a) Subsidiaries

The Consolidated Financial Statements incorporate the financial statements of the Company and entities (including structured entities) controlled by it and its subsidiaries. Control is achieved where the Company has (i) power over the investee; (ii) is exposed, or has rights, to variable returns from its involvement with the investee; and (iii) has the ability to use its power to affect its returns. The Company reassesses whether or not it controls an investee if facts and circumstances indicate that there are changes to one or more of the three elements of control listed above. When the Company has less than a majority of the voting rights of an investee, it has power over the investee when the voting rights are sufficient to give it the practical ability to direct the relevant activities of the investee unilaterally. The Company considers all relevant facts and circumstances in assessing whether or not the Company's voting rights in an investee are sufficient to give it power, including:

Consolidation of a subsidiary begins when the Company obtains control over the subsidiary and ceases when the Company loses control of the subsidiary. Specifically, the results of a subsidiary acquired or disposed of during the year are included in the consolidated income statement and the consolidated statement of comprehensive income from the date the Company gains control until the date when the Company ceases to control the subsidiary. Inter-company transactions, balances and unrealised gains on transactions between Santander UK group companies are eliminated; unrealised losses are also eliminated unless the cost cannot be recovered.

The acquisition method of accounting is used to account for the acquisition of subsidiaries which meet the definition of a business. The cost of an acquisition is measured at the fair value of the assets given up, shares issued or liabilities undertaken at the date of acquisition. Acquisition-related costs are expensed as incurred. The excess of the cost of acquisition, as well as the fair value of any interest previously held, over the fair value of the Santander UK group's share of the identifiable net assets of the subsidiary at the date of acquisition is recorded as goodwill. When the Santander UK group loses control of a subsidiary, the profit or loss on disposal is calculated as the difference between (i) the aggregate of the fair value of the consideration received and the fair value of any retained interest and (ii) the previous carrying amount of the assets (including goodwill), less liabilities of the subsidiary and any non-controlling interests. Amounts previously recognised in other comprehensive income in relation to the subsidiary are accounted for (i.e. reclassified to profit or loss or transferred directly to retained earnings) in the same manner as would be required if the relevant assets or liabilities are disposed of. The fair value of any investment retained in a former subsidiary at the date when control is lost is regarded as the fair value on initial recognition for subsequent accounting under IFRS 9 or, when applicable, the costs on initial recognition of an investment in an associate or joint venture.

Business combinations between entities under common control (i.e. fellow subsidiaries of Banco Santander SA, the ultimate parent) are outside the scope of IFRS 3 - 'Business Combinations', and there is no other guidance for such transactions under IFRS. The Santander UK group elects to account for business combinations between entities under common control at their book values in the acquired entity by including the acquired entity's results from the date of the business combination and not restating comparatives. Reorganisations of entities within the Santander UK group are also accounted for at their book values.

Interests in subsidiaries are eliminated during the preparation of the Consolidated Financial Statements. Interests in subsidiaries in the Company unconsolidated financial statements are held at cost subject to impairment.

b) Joint ventures

Joint ventures are joint arrangements whereby the parties that have joint control of the arrangement have rights to its net assets. Joint control is the contractually agreed sharing of control of an arrangement, which exists only when decisions about the relevant activities require unanimous consent of the parties sharing control. Accounting policies of joint ventures have been aligned to the extent there are differences from the Santander UK group's policies. Investments in joint ventures are accounted for by the equity method of accounting and are initially recorded at cost and adjusted each year to reflect the Santander UK group's share of their post-acquisition results. When the Santander UK group's share of losses of a joint venture exceed its interest in that joint venture, the Santander UK group discontinues recognising its share of further losses. Further losses are recognised only to the extent that the Santander UK group has incurred legal or constructive obligations or made payments on behalf of the joint venture.

Foreign currency translation

Items included in the financial statements of each entity in the Santander UK group are measured using the currency that best reflects the economic substance of the underlying events and circumstances relevant to that entity (the functional currency). The Consolidated Financial Statements are presented in sterling, which is the functional currency of the Company.

Income statements and cash flows of foreign entities are translated into the Santander UK group's presentation currency at average exchange rates for the year and their balance sheets are translated at the exchange rates ruling on 31 December. Exchange differences on the translation of the net investment in foreign entities are recognised in other comprehensive income. When a foreign entity is sold, such exchange differences are recognised in the income statement as part of the gain or loss on sale.

Foreign currency transactions are translated into the functional currency of the entity involved at the exchange rates prevailing at the dates of the transactions. Foreign exchange gains and losses resulting from the settlement of such transactions and from the translation of monetary assets and liabilities denominated in foreign currencies are recognised in the income statement unless recognised in other comprehensive income in connection with a cash flow hedge. Non-monetary items denominated in a foreign currency measured at historical cost are not retranslated. Exchange rate differences arising on non-monetary items measured at fair value are recognised in the consolidated income statement except for differences arising on equity securities measured at FVOCI (2017: available-for-sale), which are recognised in other comprehensive income.

Revenue recognition

a) Interest income and expense

Interest and similar income comprises interest income on financial assets measured at amortised cost, investments in debt instruments measured at FVOCI (2017: available-for-sale) and interest income on hedging derivatives. Interest expense and similar charges comprises interest expense on financial liabilities measured at amortised cost, and interest expense on hedging derivatives. Interest income on financial assets measured at amortised cost, investments in debt instruments measured at FVOCI (2017: available-for-sale) and interest expense on financial liabilities other than those at fair value through profit or loss (FVTPL) is determined using the effective interest rate method.

The effective interest rate is the rate that discounts the estimated future cash payments or receipts over the expected life of the instrument or, when appropriate, a shorter period, to the gross carrying amount of the financial asset (i.e. its amortised cost before any impairment allowance) or to the amortised cost of a financial liability. When calculating the effective interest rate, the future cash flows are estimated after considering all the contractual terms of the instrument excluding expected credit losses. The calculation includes all amounts paid or received by the Santander UK group that are an integral part of the overall return, direct incremental transaction costs related to the acquisition, issue or disposal of the financial instrument and all other premiums or discounts.

Interest income is calculated by applying the effective interest rate to the gross carrying amount of financial assets, except for financial assets that have subsequently become credit-impaired (or 'stage 3'), for which interest revenue is calculated by applying the effective interest rate to their amortised cost (i.e. net of the ECL provision). For more information on stage allocations of credit risk exposures, see 'Significant increase in credit risk' in the 'Santander UK group level - credit risk management' section of the Risk Review.

b) Fee and commission income and expense

Fees and commissions that are not an integral part of the effective interest rate are recognised when the service is performed. Most fee and commission income is recognised at a point in time. Certain commitment, upfront and management fees are recognised over time but are not material. For retail and corporate products, fee and commission income consists principally of collection services fees, commission on foreign currencies, commission and other fees received from retailers for processing credit card transactions, fees received from other credit card issuers for providing cash advances for their customers through the Santander UK group's branch and ATM networks, annual fees payable by credit card holders and fees for non-banking financial products.

For insurance products, fee and commission income consists principally of commissions and profit share arising from the sale of building and contents insurance and life protection insurance. Commissions arising from the sale of buildings and contents insurance are recognised over the period of insurance cover, adjusted to take account of cancelled policies. Profit share income from the sale of buildings and contents insurance which is not subject to any adjustment is recognised when the profit share income is earned. Commissions and profit share arising from the sale of life protection insurance is subject to adjustment for cancellations of policies within 3 years from inception.

Fee and commission income which forms an integral part of the effective interest rate of a financial instrument (for example certain loan commitment fees) is recognised as an adjustment to the effective interest rate and recorded in 'Interest income'.

c) Dividend income

Except for equity securities classified as trading assets or financial assets held at fair value through profit or loss, described below, dividend income is recognised when the right to receive payment is established. This is the ex-dividend date for equity securities.

d) Net trading and other income

Net trading and other income includes all gains and losses from changes in the fair value of financial assets and liabilities held at fair value through profit or loss (comprising financial assets and liabilities held for trading, trading derivatives and other financial assets and liabilities at fair value through profit or loss), together with related interest income, expense, dividends and changes in fair value of any derivatives managed in conjunction with these assets and liabilities. Changes in fair value of derivatives in a fair value hedging relationship are also recognised in net trading and other income. Net trading and other income also includes income from operating lease assets, and profits and losses arising on the sales of property, plant and equipment and subsidiary undertakings.

Borrowing costs

Borrowing costs directly attributable to the acquisition, construction or production of qualifying assets, including computer software, which are assets that necessarily take a substantial period of time to develop for their intended use, are added to the cost of those assets, until the assets are substantially ready for their intended use. All other borrowing costs are recognised in profit or loss in the period in which they occur.

Pensions and other post-retirement benefits

a) Defined benefit schemes

A defined benefit scheme is a pension scheme that guarantees an amount of pension benefit to be provided, usually as a function of one or more factors such as age, years of service or compensation. Pension costs are charged to 'Administration expenses', within the line item 'Operating expenses before impairment losses, provisions and charges' with the net interest on the defined benefit asset or liability included within 'Net interest income' in the income statement. The asset or liability recognised in respect of defined benefit pension schemes is the present value of the defined benefit obligation at the balance sheet date, less the fair value of scheme assets. The defined benefit obligation is calculated annually by independent actuaries using the projected unit credit method. The assets of the schemes are measured at their fair values at the balance sheet date.

The present value of the defined benefit obligation is estimated by projecting forward the growth in current accrued pension benefits to reflect inflation and salary growth to the date of pension payment, then discounted to present value using the yield applicable to high-quality AA rated corporate bonds of the same currency and which have terms to maturity closest to the terms of the scheme liabilities, adjusted where necessary to match those terms. In determining the value of scheme liabilities, demographic and financial assumptions are made by management about life expectancy, inflation, discount rates, pension increases and earnings growth, based on past experience and future expectations. Financial assumptions are based on market conditions at the balance sheet date and can generally be derived objectively.

Demographic assumptions require a greater degree of estimation and judgement to be applied to externally derived data. Any surplus or deficit of scheme assets over liabilities is recognised in the balance sheet as an asset (surplus) or liability (deficit). An asset is only recognised to the extent that the surplus can be recovered through reduced contributions in the future or through refunds from the scheme. The income statement includes the net interest income/expense on the net defined benefit liability/asset, current service cost and any past service cost and gain or loss on settlement. Remeasurement of defined benefit pension schemes, including return on scheme assets (excludes amounts included in net interest), actuarial gains and losses (arising from changes in demographic assumptions, the impact of scheme experience and changes in financial assumptions) and the effect of the changes to the asset ceiling (if applicable), are recognised in other comprehensive income. Remeasurement recognised in other comprehensive income will not be reclassified to the income statement. Past-service costs are recognised as an expense in the income statement at the earlier of when the scheme amendment or curtailment occurs and when the related restructuring costs or termination benefits are recognised. Curtailments include the impact of significant reductions in the number of employees covered by a scheme, or amendments to the terms of the scheme so that a significant element of future service will no longer qualify for benefits or will qualify only for reduced benefits. Curtailment gains and losses on businesses that meet the definition of discontinued operations are included in profit or loss for the year from discontinued operations. Gains and losses on settlements are recognised when the settlement occurs.

b) Defined contribution plans

A defined contribution plan is a pension scheme under which the Santander UK group pays fixed contributions as they fall due into a separate entity (a fund). The pension paid to the member at retirement is based on the amount in the separate fund for each member. The Santander UK group has no legal or constructive obligations to pay further contributions into the fund to 'top up' benefits to a certain guaranteed level. The regular contributions constitute net periodic costs for the year in which they are due and are included in staff costs within Operating expenses in the income statement.

c) Post-retirement medical benefit plans

Post-retirement medical benefit liabilities are determined using the projected unit credit method, with actuarial valuations updated at each year-end. The expected benefit costs are accrued over the period of employment using an accounting methodology similar to that for the defined benefit pension scheme.

Share-based payments

The Santander UK group engages in cash-settled and equity-settled share-based payment transactions in respect of services received from certain of its employees. Shares of the Santander UK group's parent, Banco Santander SA are purchased in the open market by the Santander UK group (for the Employee Sharesave scheme) or are purchased by Banco Santander SA or another Banco Santander company (for awards granted under the Long-Term Incentive Plan and the Deferred Shares Bonus Plan) to satisfy share options or awards as they vest.

Options granted under the Employee Sharesave scheme are accounted for as cash-settled share-based payment transactions. Awards granted under the Long-Term Incentive Plan and Deferred Shares Bonus Plan are accounted for as equity-settled share-based payment transactions.

The fair value of the services received is measured by reference to the fair value of the shares or share options initially on the date of the grant for both the cash and equity settled share-based payments and then subsequently at each reporting date for the cash-settled share-based payments. The cost of the employee services received in respect of the shares or share options granted is recognised in the income statement in administration expenses over the period that the services are received i.e. the vesting period.

A liability equal to the portion of the services received is recognised at the fair value determined at each balance sheet date for cash-settled share-based payments. A liability equal to the amount to be reimbursed to Banco Santander SA is recognised at the fair value determined at the grant date for equity-settled share-based payments.

The fair value of the options granted under the Employee Sharesave scheme is determined using an option pricing model, which takes into account the exercise price of the option, the current share price, the risk free interest rate, the expected volatility of the Banco Santander SA share price over the life of the option and the dividend growth rate. The fair value of the awards granted for the Long-Term Incentive Plan was determined at the grant date using an option pricing model, which takes into account the share price at grant date, the risk free interest rate, the expected volatility of the Banco Santander SA share price over the life of the award and the dividend growth rate. Vesting conditions included in the terms of the grant are not taken into account in estimating fair value, except for those that include terms related to market conditions. Non-market vesting conditions are taken into account by adjusting the number of shares or share options included in the measurement of the cost of employee service so that, ultimately, the amount recognised in the income statement reflects the number of vested shares or share options. Where vesting conditions are related to market conditions, the charges for the services received are recognised regardless of whether or not the market-related vesting conditions are met, provided that the non-market vesting conditions are met.

Where an award has been modified, as a minimum, the expense of the original award continues to be recognised as if it had not been modified. Where the effect of a modification is to increase the fair value of an award or increase the number of equity instruments, the incremental fair value of the award or incremental fair value of the modification of the award is recognised in addition to the expense of the original grant, measured at the date of modification, over the modified vesting period.

Cancellations in the vesting period are treated as an acceleration of vesting, and recognised immediately for the amount that would otherwise have been recognised for services over the vesting period.

Goodwill and other intangible assets

Goodwill represents the excess of the cost of an acquisition, as well as the fair value of any interest previously held, over the fair value of the share of the identifiable net assets of the acquired subsidiary, associate, or business at the date of acquisition. Goodwill on the acquisition of subsidiaries and businesses is included in intangible assets. Goodwill on acquisitions of associates is included as part of investment in associates. Goodwill is tested for impairment at each balance sheet date, or more frequently when events or changes in circumstances dictate, and carried at cost less accumulated impairment losses. Gains and losses on the disposal of an entity or business include the carrying amount of goodwill relating to the entity or business sold.

Other intangible assets are recognised if they arise from contractual or other legal rights or if they are capable of being separated or divided from the Santander UK group and sold, transferred, licensed, rented or exchanged. The value of such intangible assets is amortised on a straight-line basis over their useful economic life of three to seven years. Other intangible assets are reviewed annually for impairment indicators and tested for impairment where indicators are present.

Software development costs are capitalised when they are direct costs associated with identifiable and unique software products that are expected to provide future economic benefits and the cost of those products can be measured reliably. These costs include payroll, materials, services and directly attributable overheads. Internally developed software meeting these criteria and externally purchased software are classified in intangible assets on the balance sheet and amortised on a straight-line basis over their useful life of three to seven years, unless the software is an integral part of the related computer hardware, in which case it is treated as property, plant and equipment as described below. Capitalisation of costs ceases when the software is capable of operating as intended. Costs of maintaining software are expensed as incurred.

Property, plant and equipment

Property, plant and equipment include owner-occupied properties (including leasehold properties), office fixtures and equipment and computer software. Property, plant and equipment are carried at cost less accumulated depreciation and accumulated impairment losses. A review for indications of impairment is carried out at each reporting date. Gains and losses on disposal are determined by reference to the carrying amount and are reported in net trading and other income. Repairs and renewals are charged to the income statement when the expenditure is incurred. Internally developed software meeting the criteria set out in 'Goodwill and other intangible assets' above and externally purchased software are classified in property, plant and equipment where the software is an integral part of the related computer hardware (for example operating system of a computer). Classes of property, plant and equipment are depreciated on a straight-line basis over their useful life, as follows:

Depreciation is not charged on freehold land and assets under construction.

Financial instruments

a) Initial recognition and measurement

Financial assets and liabilities are initially recognised when the Santander UK group becomes a party to the contractual terms of the instrument. The Santander UK group determines the classification of its financial assets and liabilities at initial recognition and measures a financial asset or financial liability at its fair value plus or minus, in the case of a financial asset or financial liability not at FVTPL, transaction costs that are incremental and directly attributable to the acquisition or issue of the financial asset or financial liability. Transaction costs of financial assets and financial liabilities carried at fair value through profit or loss are expensed in profit or loss. Immediately after initial recognition, an expected credit loss (ECL) allowance is recognised for financial assets measured at amortised cost and investments in debt instruments measured at FVOCI.

A regular way purchase is a purchase of a financial asset under a contract whose terms require delivery of the asset within the timeframe established generally by regulation or convention in the market place concerned. Regular way purchases of financial assets classified as loans and receivables, issues of equity or financial liabilities measured at amortised cost are recognised on settlement date; all other regular way purchases and issues are recognised on trade date.

b) Financial assets and liabilities

i) Classification and subsequent measurement

From 1 January 2018, the Santander UK group has applied IFRS 9 Financial Instruments and classifies its financial assets in the measurement categories of amortised cost, FVOCI and FVTPL.

Financial assets and financial liabilities are classified as FVTPL where there is a requirement to do so or where they are otherwise designated at FVTPL on initial recognition. Financial assets and financial liabilities which are required to be held at FVTPL include:

Financial assets and financial liabilities are classified as held for trading if they are derivatives or if they are acquired or incurred principally for the purpose of selling or repurchasing in the near-term, or form part of a portfolio of financial instruments that are managed together and for which there is evidence of short-term profit taking.

In certain circumstances, other financial assets and financial liabilities are designated at FVTPL where this results in more relevant information. This may arise because it significantly reduces a measurement inconsistency that would otherwise arise from measuring assets or liabilities or recognising the gains or losses on them on a different basis, where the assets and liabilities are managed and their performance evaluated on a fair value basis or, in the case of financial liabilities, where it contains one or more embedded derivatives which are not closely related to the host contract.

The classification and measurement requirements for financial asset debt and equity instruments and financial liabilities are set out below.

a) Financial assets: debt instruments

Debt instruments are those instruments that meet the definition of a financial liability from the issuer's perspective, such as loans and government and corporate bonds. Classification and subsequent measurement of debt instruments depend on the Santander UK group's business model for managing the asset, and the cash flow characteristics of the asset.

Business model

The business model reflects how the Santander UK group manages the assets in order to generate cash flows and, specifically, whether the Santander UK group's objective is solely to collect the contractual cash flows from the assets or is to collect both the contractual cash flows and cash flows arising from the sale of the assets. If neither of these is applicable, such as where the financial assets are held for trading purposes, then the financial assets are classified as part of an 'other' business model and measured at FVTPL. Factors considered in determining the business model for a group of assets include past experience on how the cash flows for these assets were collected, how the assets' performance is evaluated and reported to key management personnel, and how risks are assessed and managed.

SPPI

Where the business model is to hold assets to collect contractual cash flows or to collect contractual cash flows and sell, the Santander UK group assesses whether the assets' cash flows represent SPPI. In making this assessment, the Santander UK group considers whether the contractual cash flows are consistent with a basic lending arrangement (i.e. interest includes only consideration for the time value of money, credit risk, other basic lending risks and a profit margin that is consistent with a basic lending arrangement). Where the contractual terms introduce exposure to risk or volatility that is inconsistent with a basic lending arrangement, the related asset is classified and measured at FVTPL.

Financial assets with embedded derivatives are considered in their entirety when determining whether their cash flows are SPPI.

Based on these factors, the Santander UK group classifies its debt instruments into one of the following measurement categories:

The Santander UK group reclassifies financial assets when and only when its business model for managing those assets changes. The reclassification takes place from the start of the first reporting period following the change. Such changes are expected to be very infrequent.

b) Financial assets: equity instruments

Equity instruments are instruments that meet the definition of equity from the issuer's perspective, being instruments that do not contain a contractual obligation to pay cash and that evidence a residual interest in the issuer's net assets. All equity investments are subsequently measured at FVTPL, except where management has elected, at initial recognition, to irrevocably designate an equity investment at FVOCI. When this election is used, fair value gains and losses are recognised in OCI and are not subsequently reclassified to profit or loss, including on disposal. ECLs (and reversal of ECLs) are not reported separately from other changes in fair value. Dividends, when representing a return on such investments, continue to be recognised in profit or loss as other income when the right to receive payments is established. Gains and losses on equity investments at FVTPL are included in the 'Net trading and other income' line in the income statement.

c) Financial liabilities

Financial liabilities are classified as subsequently measured at amortised cost, except for:

Contracts involving the receipt of cash on which customers receive an index-linked return are accounted for as equity index-linked deposits. The principal products are Capital Guaranteed/Protected Products which give the customers a limited participation in the upside growth of an equity index. In the event the index falls in price, a cash principal element is guaranteed/protected. The equity index-linked deposits contain embedded derivatives. These embedded derivatives, in combination with the principal cash deposit element, are designed to replicate the investment performance profile tailored to the return agreed in the contracts with customers. The cash principal element is accounted for as deposits by customers at amortised cost. The embedded derivatives are separated from the host instrument and are separately accounted for as derivatives.

d) Sale and repurchase agreements (including stock borrowing and lending)

Securities sold subject to a commitment to repurchase them at a predetermined price (repos) under which substantially all the risks and rewards of ownership are retained by the Santander UK group remain on the balance sheet and a liability is recorded in respect of the consideration received. Securities purchased under commitments to resell (reverse repos) are not recognised on the balance sheet and the consideration paid is recorded as an asset. The difference between the sale and repurchase price is treated as trading income in the income statement, except where the repo is not treated as part of the trading book, in which case the difference is recorded in interest income or expense.

Securities lending and borrowing transactions are generally secured, with collateral in the form of securities or cash advanced or received. Securities lent or borrowed are not reflected on the balance sheet. Collateral in the form of cash received or advanced is recorded as a deposit or a loan. Collateral in the form of securities is not recognised.

e) Day One profit adjustments

The fair value of a financial instrument on initial recognition is generally its transaction price (that is, the fair value of the consideration given or received). However, sometimes the fair value will be based on other observable current market transactions in the same instrument, without modification or repackaging, or on a valuation technique whose variables include only data from observable markets, such as interest rate yield curves, option volatilities and currency rates. When such evidence exists, the Santander UK group recognises a trading gain or loss at inception (Day One gain or loss), being the difference between the transaction price and the fair value. When significant unobservable parameters are used, the entire Day One gain or loss is deferred and is recognised in the income statement over the life of the transaction until the transaction matures, is closed out, the valuation inputs become observable or an offsetting transaction is entered into.

ii) Impairment of debt instrument financial assets

The Santander UK group assesses on a forward-looking basis the ECL associated with its debt instrument assets carried at amortised cost and FVOCI and with the exposure arising from financial guarantee contracts and loan commitments. The Santander UK group recognises a loss allowance for such losses at each reporting date. The measurement of ECL reflects:

Grouping of instruments for losses measured on a collective basis

We typically group instruments and assess them for impairment collectively where they share risk characteristics (as described in Retail Banking - credit risk management in the Risk review) using one or more statistical models. Where we have used internal capital or similar models as the basis for our IFRS 9 models, this typically results in a large number of relatively small homogenous groups which are determined by the permutations of the underlying characteristics in the statistical models. We calculate separate collective provisions for instruments in Stages 1, 2 and 3 where the instrument is not individually assessed, as described below.

Individually assessed impairments (IAIs)

We assess significant Stage 3 cases individually. We do this for CIB and Corporate & Commercial Banking cases, but not for Business Banking cases in Retail Banking which we assess collectively. To calculate the estimated loss, we estimate the future cash flows under several scenarios each of which uses case-specific factors and circumstances. We then probability-weight the net present value of the cash flows under each scenario to arrive at a weighted average provision requirement. We update our assessment process every quarter and more frequently if there are changes in circumstances that might affect the scenarios, cash flows or probabilities we apply.

For more on how ECL is calculated, see the Credit risk section of the Risk review.

a) Write-off

For secured loans, a write-off is only made when all collection procedures have been exhausted and the security has been sold or from claiming on any mortgage indemnity guarantee or other insurance. In the corporate portfolio, there may be occasions where a write-off occurs for other reasons, such as following a consensual restructure or refinancing of the debt or where the debt is sold for strategic reasons into the secondary market at a value lower than its face value.

There is no threshold based on past due status beyond which all secured loans are written off as there can be significant variations in the time needed to enforce possession and sale of the security, especially due to the different legal frameworks that apply in different regions of the UK. For unsecured loans, a write-off is only made when all internal avenues of collecting the debt have been exhausted and the debt is passed over to external collection agencies. A past due threshold is applied to unsecured debt where accounts that are 180 days past due are written off unless there is a dispute awaiting resolution. Contact is made with customers with the aim to achieve a realistic and sustainable repayment arrangement. Litigation and/or enforcement of security is usually carried out only when the steps described above have been undertaken without success.

All write-offs are assessed / made on a case-by-case basis, taking account of the exposure at the date of write-off, after accounting for the value from any collateral or insurance held against the loan. The exception to this is in cases where fraud has occurred, where the exposure is written off once investigations have been completed and the probability of recovery is minimal. The time span between discovery and write-off will be short and may not result in an impairment loss allowance being raised. The write-off policy is regularly reviewed. Write-offs are charged against previously established loss allowances.

b) Recoveries

Recoveries of credit impairment losses are not included in the impairment loss allowance, but are taken to income and offset against credit impairment losses. Recoveries of credit impairment losses are classified in the income statement as 'Credit impairment losses'.

iii) Modifications of financial assets

The treatment of a renegotiation or modification of the contractual cash flows of a financial asset normally depends upon whether the renegotiation or modification is due to financial difficulties of the borrower or for other commercial reasons.

Any other contractual modifications, such as where a regulatory authority imposes a change in certain contractual terms or due to legal reasons, are assessed on a case-by-case basis to establish whether or not the financial asset should be derecognised.

iv) Derecognition other than on a modification

Financial assets are derecognised when the rights to receive cash flows have expired or the Santander UK group has transferred its contractual right to receive the cash flows from the assets and either: (1) substantially all the risks and rewards of ownership have been transferred; or (2) the Santander UK group has neither retained nor transferred substantially all of the risks and rewards, but has transferred control.

Financial liabilities are derecognised when extinguished, cancelled or expired.

c) Financial guarantee contracts and loan commitments

Financial guarantee contracts are contracts that require the issuer to make specified payments to reimburse the holder for a loss it incurs because a specified debtor fails to make payments when due, in accordance with the terms of a debt instrument. Such financial guarantees are given to banks, financial institutions and others on behalf of customers to secure loans, overdrafts and other banking facilities.

Financial guarantee contracts are initially measured at fair value and subsequently measured at the higher of the amount of the loss allowance, and the premium received on initial recognition less income recognised in accordance with the principles of IFRS 15. Loan commitments are measured as the amount of the loss allowance. The Santander UK group has not provided any commitment to provide loans at a below-market interest rate, or that can be settled net in cash or by delivering or issuing another financial instrument.

For financial guarantee contracts and loan commitments, the loss allowance is recognised as a provision and charged to credit impairment losses in the income statement. The loss allowance in respect of revolving facilities is classified in loans and advances to customers to the extent of any drawn balances. The loss allowance in respect of undrawn amounts is classified in provisions. When amounts are drawn, any related loss allowance is transferred from provisions to loans and advances to customers.

Derivative financial instruments (derivatives)

Derivatives are contracts or agreements whose value is derived from one or more underlying indices or asset values inherent in the contract or agreement, which require no or little initial net investment and are settled at a future date. Transactions are undertaken in interest rate, cross currency, equity, residential property and other index-related swaps, forwards, caps, floors, swaptions, as well as credit default and total return swaps, equity index contracts and exchange traded interest rate futures, and equity index options.

Derivatives are held for risk management purposes. Derivatives are classified as held for trading unless they are designated as being in a hedge accounting relationship. The Santander UK group chooses to designate certain derivatives as in a hedging relationship if they meet specific criteria, as further described in 'Hedge accounting' below.

Derivatives are recognised initially (on the date on which a derivative contract is entered into), and are subsequently remeasured, at their fair value. Fair values of exchange-traded derivatives are obtained from quoted market prices. Fair values of over-the-counter derivatives are estimated using valuation techniques, including discounted cash flow and option pricing models.

Certain derivatives may be embedded in hybrid contracts, such as the conversion option in a convertible bond. If the hybrid contract contains a host that is a financial asset, then the Santander UK group assesses the entire contract as described in the financial asset section above for classification and measurement purposes. Otherwise, embedded derivatives are treated as separate derivatives when their economic characteristics and risks are not closely related to those of the host contract; the terms of the embedded derivative would meet the definition of a stand-alone derivative if they were contained in a separate contract; and the combined contract is not held for trading or designated at fair value. These embedded derivatives are measured at fair value with changes in fair value recognised in the income statement.

Contracts containing embedded derivatives are not subsequently reassessed for separation unless either there has been a change in the terms of the contract which significantly modifies the cash flows (in which case the contract is reassessed at the time of modification) or the contract has been reclassified (in which case the contract is reassessed at the time of reclassification).

All derivatives are carried as assets when their fair value is positive and as liabilities when their fair value is negative, except where netting is permitted. The method of recognising fair value gains and losses depends on whether derivatives are held for trading or are designated as hedging instruments and, if the latter, the nature of the risks being hedged. Gains and losses from changes in the fair value of derivatives held for trading are recognised in the income statement, and included within net trading and other income.

Offsetting financial assets and liabilities

Financial assets and liabilities including derivatives are offset and the net amount reported in the balance sheet when there is a legally enforceable right to set off the recognised amounts and there is an intention to settle on a net basis, or realise the asset and settle the liability simultaneously. The Santander UK group is party to a number of arrangements, including master netting arrangements under industry standard agreements which facilitate netting of transactions in jurisdictions where netting agreements are recognised and have legal force. The netting arrangements do not generally result in an offset of balance sheet assets and liabilities for accounting purposes, as transactions are usually settled on a gross basis.

Hedge accounting

The Santander UK group applies hedge accounting to represent, to the maximum possible extent permitted under accounting standards, the economic effects of its risk management strategies. Derivatives are used to hedge exposures to interest rates, exchange rates and certain indices such as retail price indices.

At the time a financial instrument is designated as a hedge (i.e. at the inception of the hedge), the Santander UK group formally documents the relationship between the hedging instrument(s) and hedged item(s), its risk management objective and strategy for undertaking the hedge. The documentation includes the identification of each hedging instrument and respective hedged item, the nature of the risk being hedged (including the benchmark interest rate being hedged in a hedge of interest rate risk) and how the hedging instrument's effectiveness in offsetting the exposure to changes in the hedged item's fair value attributable to the hedged risk is to be assessed. Accordingly, the Santander UK group formally assesses, both at the inception of the hedge and on an ongoing basis, whether the hedging derivatives have been and will be highly effective in offsetting changes in the fair value attributable to the hedged risk during the period that the hedge is designated. A hedge is normally regarded as highly effective if, at inception and throughout its life, the Santander UK group can expect, and actual results indicate, that changes in the fair value or cash flow of the hedged items are effectively offset by changes in the fair value or cash flow of the hedging instrument. If at any point it is concluded that it is no longer highly effective in achieving its documented objective, hedge accounting is discontinued.

Where derivatives are held for risk management purposes, and when transactions meet the required criteria for documentation and hedge effectiveness, the derivatives may be designated as either: (i) hedges of the change in fair value of recognised assets or liabilities or firm commitments (fair value hedges); (ii) hedges of the variability in highly probable future cash flows attributable to a recognised asset or liability, or a forecast transaction (cash flow hedges); or (iii) a hedge of a net investment in a foreign operation (net investment hedges). The Santander UK group applies fair value and cash flow hedge accounting, but not hedging of a net investment in a foreign operation.

a) Fair value hedge accounting

Changes in the fair value of derivatives that are designated and qualify as fair value hedges are recorded in the income statement, together with the changes in the fair value of the hedged asset or liability that are attributable to the hedged risk. Where the hedged item is measured at amortised cost, the fair value changes due to the hedged risk adjust the carrying amount of the hedged asset or liability. Changes in the fair value of portfolio hedged items are presented separately in the consolidated balance sheet in macro hedge of interest rate risk and recognised in the income statement within net trading and other income. If the hedge no longer meets the criteria for hedge accounting, changes in the fair value of the hedged item attributable to the hedged risk are no longer recognised in the income statement. For fair value hedges of interest rate risk, the cumulative adjustment that has been made to the carrying amount of the hedged item is amortised to the income statement using the effective interest method over the period to maturity. For portfolio hedged items, the cumulative adjustment is amortised to the income statement using the straight line method over the period to maturity.

b) Cash flow hedge accounting

The effective portion of changes in the fair value of qualifying cash flow hedges is recognised in other comprehensive income in the cash flow hedging reserve. The gain or loss relating to the ineffective portion is recognised immediately in the income statement. Amounts accumulated in equity are reclassified to the income statement in the periods in which the hedged item affects profit or loss. When a hedging instrument expires or is sold, or when a hedge no longer meets the criteria for hedge accounting, any cumulative gain or loss existing in equity at that time remains in equity and is recognised in the income statement when the forecast transaction is ultimately recognised in the income statement. When a forecast transaction is no longer expected to occur, the cumulative gain or loss that was reported in equity is immediately transferred to the income statement. The Santander UK group is exposed to cash flow interest rate risk on its floating rate assets and foreign currency risk on its fixed rate debt issuances denominated in foreign currency. Cash flow hedging is used to hedge the variability in cash flows arising from both these risks.

Securitisation transactions

The Santander UK group has entered into arrangements where undertakings have issued mortgage-backed and other asset-backed securities or have entered into funding arrangements with lenders in order to finance specific loans and advances to customers. As the Santander UK group has retained substantially all the risks and rewards of the underlying assets, such financial instruments continue to be recognised on the balance sheet, and a liability recognised for the proceeds of the funding transaction.

Impairment of non-financial assets

At each balance sheet date, or more frequently when events or changes in circumstances dictate, property plant and equipment (including operating lease assets) and intangible assets (including goodwill) are assessed for indicators of impairment. If indications are present, these assets are subject to an impairment review. The impairment review comprises a comparison of the carrying amount of the asset or cash generating unit with its recoverable amount: the higher of the asset's or cash-generating unit's fair value less costs to sell and its value in use. The cash-generating unit represents the lowest level at which non-financial assets including goodwill is monitored for internal management purposes and is not larger than an operating segment.

The fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Value in use is calculated by discounting management's expected future cash flows obtainable as a result of the asset's continued use, including those resulting from its ultimate disposal, at a market based discount rate on a pre-tax basis. The recoverable amounts of goodwill have been based on value in use calculations.

The carrying values of property, plant and equipment, goodwill and other intangible assets are written down by the amount of any impairment and the loss is recognised in the income statement in the period in which it occurs. A previously recognised impairment loss relating to property, plant and equipment may be reversed in part or in full when a change in circumstances leads to a change in the estimates used to determine the property, plant and equipment's recoverable amount. The carrying amount of the property, plant and equipment will only be increased up to the amount that would have been had the original impairment not been recognised. Impairment losses on goodwill are not reversed. For conducting goodwill impairment reviews, cash generating units are the lowest level at which management monitors the return on investment on assets.

Leases

a) The Santander UK group as lessor

Operating lease assets are recorded at cost and depreciated over the life of the asset after taking into account anticipated residual value. Operating lease rental income and depreciation is recognised on a straight-line basis over the life of the asset. Amounts due from lessees under finance leases and hire purchase contracts are recorded as receivables at the amount of the Santander UK group's net investment in the leases. Finance lease income is allocated to accounting periods so as to reflect a constant periodic rate of return on the Santander UK group's net investment outstanding in respect of the leases and hire purchase contracts. A provision is recognised to reflect a reduction in any anticipated unguaranteed RV. A provision is also recognised for voluntary termination of the contract by the customer, where appropriate.

b) The Santander UK group as lessee

The Santander UK group enters into operating leases for the rental of equipment or real estate. Payments made under such leases are charged to the income statement on a straight-line basis over the period of the lease. When an operating lease is terminated before the lease period has expired, any payment to be made to the lessor by way of penalty is recognised as an expense in the period in which termination takes place.

If the lease agreement transfers the risk and rewards of the asset, the lease is recorded as a finance lease and the related asset is capitalised. At inception, the asset is recorded at the lower of the present value of the minimum lease payments or fair value and depreciated over the lower of the estimated useful life and the life of the lease. The corresponding rental obligations are recorded as borrowings. The aggregate benefit of incentives, if any, is recognised as a reduction of rental expense over the lease term on a straight-line basis.

Income taxes, including deferred taxes

The tax expense represents the sum of the income tax currently payable and deferred income tax.

Income tax payable on profits, based on the applicable tax law in each jurisdiction, is recognised as an expense in the period in which profits arise. Taxable profit differs from net profit as reported in the income statement because it excludes items of income or expense that are taxable or deductible in other years and it further excludes items that are never taxable or deductible. The liability for current tax is calculated using tax rates that have been enacted or substantively enacted by the balance sheet date. Current taxes associated with the repurchase of equity instruments are reported directly in equity.

A current tax liability for the current or prior period is measured at the amount expected to be paid to the tax authorities. Where the amount of the final tax liability is uncertain or where a position is challenged by a taxation authority, the liability recognised is the most likely outcome. Where a most likely outcome cannot be determined, a weighted average basis is applied.

Deferred income tax is the tax expected to be payable or recoverable on income tax losses available to carry forward and on temporary differences arising between the tax bases of assets and liabilities and their carrying amounts in the Consolidated Financial Statements and is accounted for using the balance sheet liability method. Deferred tax liabilities are generally recognised for all taxable temporary differences and deferred tax assets are recognised to the extent that it is probable that taxable profits will be available against which the assets may be utilised as they reverse. Such deferred tax liabilities are not recognised if the temporary difference arises from the initial recognition of goodwill. Deferred tax assets and liabilities are not recognised from the initial recognition of other assets (other than in a business combination) and liabilities in a transaction that affects neither the taxable profit nor the accounting profit.

Deferred tax is calculated at the tax rates that are expected to apply in the period when the liability is settled or the asset is realised based on rates enacted or substantively enacted at the balance sheet date. Deferred tax is charged or credited in the income statement, except when it relates to items recognised in other comprehensive income or directly in equity, in which case the deferred tax is also recognised in other comprehensive income or directly in equity. Deferred tax liabilities are recognised for taxable temporary differences arising on investments in subsidiaries except where the Santander UK group is able to control reversal of the temporary difference and it is probable that it will not reverse in the foreseeable future. The Santander UK group reviews the carrying amount of deferred tax assets at each balance sheet date and reduces it to the extent that it is no longer probable that sufficient taxable profits will be available to allow all or part of the asset to be recovered.

Deferred tax relating to actuarial gains and losses on defined benefits is recognised in other comprehensive income. Deferred tax relating to fair value re-measurements of financial instruments accounted for at FVOCI and cash flow hedging instruments is charged or credited directly to other comprehensive income and is subsequently recognised in the income statement when the deferred fair value gain or loss is recognised in the income statement.

Deferred and current tax assets and liabilities are only offset when they arise in the same tax reporting group and where there is both the legal right and the intention to settle on a net basis or to realise the asset and settle the liability simultaneously.

Cash and cash equivalents

For the purposes of the cash flow statement, cash and cash equivalents comprise balances with less than three months maturity from the date of acquisition, including cash and non-restricted balances with central banks, treasury bills and other eligible bills, loans and advances to banks and short-term investments in securities.

Balances with central banks represent amounts held at the Bank of England and, at 31 December 2017, the US Federal Reserve as part of the Santander UK group's liquidity management activities. In addition, it includes certain minimum cash balances held for regulatory purposes required to be maintained with the Bank of England.

Provisions

Provisions are recognised for present obligations arising as consequences of past events where it is more likely than not that a transfer of economic benefits will be necessary to settle the obligation, and it can be reliably estimated.

Conduct provisions are made for the estimated cost of making redress payments with respect to the past sales of products, based on conclusions regarding the number of claims that will be received, including the number of those that will be upheld, the estimated average settlement per case and other related costs. Provision is made for the anticipated cost of restructuring, including redundancy costs, when an obligation exists. An obligation exists when the Santander UK group has a detailed formal plan for restructuring a business, has raised valid expectations in those affected by the restructuring, and has started to implement the plan or announce its main features.

When a leasehold property ceases to be used in the business, provision is made where the unavoidable costs of the future obligations relating to the lease are expected to exceed anticipated rental income. The net costs are discounted using market rates of interest to reflect the long-term nature of the cash flows.

Provisions include amounts in respect of irrevocable loan commitments. The provision is the present value of the difference between the contractual cash flows based on the expected drawdowns and the cash flows that the Santander UK group expects to receive.

Contingent liabilities are possible obligations whose existence will be confirmed only by certain future events or present obligations where the transfer of economic benefit is uncertain or cannot be reliably measured. Contingent liabilities are not recognised but are disclosed unless they are remote.

Share capital

a) Share issue costs

Incremental external costs directly attributable to the issue of new shares are deducted from equity net of related income taxes.

b) Dividends

Dividends on ordinary shares are recognised in equity in the period in which the right to receive payment is established.

Accounting policies relating to comparatives - IAS 39

On 1 January 2018, Santander UK group adopted IFRS 9, which replaced IAS 39. In accordance with the transition requirements of IFRS 9, comparatives were not restated. The accounting policies applied in accordance with IAS 39 for periods before the adoption of IFRS 9 are set out below:

Financial assets and liabilities - IAS 39

Financial assets and liabilities are initially recognised when the Santander UK group becomes a party to the contractual terms of the instrument. The Santander UK group determines the classification of its financial assets and liabilities at initial recognition. Financial assets are classified as financial assets at fair value through profit or loss, loans and receivables, available-for-sale financial assets and held-to-maturity investments. Financial assets that are classified at fair value through profit or loss, which have not been designated as such or are not accounted for as derivatives, or assets classified as available-for-sale, may subsequently in rare circumstances, be reclassified from the fair value through profit or loss category to the loans and receivables, available-for-sale or held-to-maturity categories. Financial liabilities are classified as fair value through profit or loss if they are either held for trading or otherwise designated at fair value through profit or loss on initial recognition.

a) Financial assets and liabilities at fair value through profit or loss

Financial assets and financial liabilities are classified as FVTPL if they are either held for trading or otherwise designated at FVTPL on initial recognition. Financial assets and financial liabilities are classified as held for trading if they are derivatives or if they are acquired or incurred principally for the purpose of selling or repurchasing in the near-term, or form part of a portfolio of financial instruments that are managed together and for which there is evidence of short-term profit taking. In certain circumstances, financial assets and financial liabilities other than those that are held for trading are designated at FVTPL where this results in more relevant information because it significantly reduces a measurement inconsistency that would otherwise arise from measuring assets or liabilities or recognising the gains or losses on them on a different basis, where the assets or liabilities are managed and their performance evaluated on a fair value basis, or where a financial asset or financial liability contains one or more embedded derivatives which are not closely related to the host contract.

Financial assets and financial liabilities classified as FVTPL are initially recognised at fair value and transaction costs are taken directly to the income statement. Gains and losses arising from changes in fair value are included directly in the income statement except for gains and losses on financial liabilities designated at FVTPL relating to own credit which are presented in other comprehensive income.

Derivative financial instruments, trading assets and liabilities and financial assets and liabilities designated at fair value are classified as FVTPL.

b) Loans and receivables

Loans and receivables are non-derivative financial assets with fixed or determinable payments, that are not quoted in an active market and which are not classified as available-for-sale or FVTPL. They arise when the Santander UK group provides money or services directly to a customer with no intention of trading the loan. Loans and receivables are initially recognised at fair value including direct and incremental transaction costs. They are subsequently valued at amortised cost, using the effective interest method. Loans and receivables consist of loans and advances to banks, loans and advances to customers, and loans and receivables securities.

c) Available-for-sale financial assets

Available-for-sale financial assets are non-derivative financial assets that are designated as available-for-sale and are not categorised into any of the other categories described. They are initially recognised at fair value including direct and incremental transaction costs, and subsequently held at fair value. Gains and losses arising from changes in fair value are recognised in other comprehensive income until sale or until determined to be impaired when the cumulative gain or loss or impairment losses are transferred to the income statement. Where the financial asset is interest-bearing, interest is determined using the effective interest method. Income on investments in equity shares, debt instruments and other similar interests is recognised in the income statement as and when dividends are declared and interest is accrued. Impairment losses and foreign exchange translation differences on monetary items are recognised in the income statement.

d) Held-to-maturity investments

Held-to-maturity investments are non-derivative financial assets with fixed or determinable payments and fixed maturities that the Santander UK group's management has the positive intention and ability to hold to maturity other than those that meet the definition of loans and receivables or that the Santander UK group designates upon initial recognition as at fair value through profit or loss, or available-for-sale. They are initially recognised at fair value including direct and incremental transaction costs and measured subsequently at amortised cost, using the effective interest method, less any provision for impairment. A sale or reclassification of a more than insignificant amount of held-to-maturity investments would result in the reclassification of all held-to-maturity investments to available-for-sale financial assets.

Impairment of financial assets - IAS 39

At each balance sheet date, the Santander UK group assesses whether there is objective evidence that a financial asset or group of financial assets is impaired. A financial asset or a group of financial assets is impaired and impairment losses are incurred only if there is objective evidence of impairment as a result of one or more events that occurred after the initial recognition of the asset (a loss event) and that loss event (or events) has an impact on the estimated future cash flows of the financial asset or group of financial assets that can be reliably estimated. In the case of equity investments classified as available-for-sale, a significant or prolonged decline in the fair value of the security below its cost is considered an indicator that the assets are impaired.

a) Assets carried at amortised cost

For loans and advances, loans and receivables securities and held-to-maturity investments, the amount of the loss is measured as the difference between the asset's carrying amount and the present value of estimated future cash flows (excluding future credit losses that have not been incurred) discounted at the financial asset's original effective interest rate. The carrying amount of the asset is reduced and the amount of the loss is recognised in profit or loss. If a loan or held-to-maturity investment has a variable interest rate, the discount rate for measuring any impairment loss is the current effective interest rate determined under the contract.

Subsequent to the recognition of an impairment loss on a financial asset or a group of financial assets, interest income continues to be recognised on an effective interest rate basis, on the asset's carrying value net of impairment provisions. If, in a subsequent period, the amount of the impairment loss decreases and the decrease can be related objectively to an event occurring after the impairment was recognised (such as an improvement in the debtor's credit rating), the reversal of the previously recognised impairment loss is recognised in profit or loss.

Impairment allowances are assessed individually for financial assets that are individually significant. Impairment allowances for portfolios of smaller balance homogenous loans such as most residential mortgages, personal loans and credit card balances that are below the individual assessment thresholds, and for loan losses that have been incurred but not separately identified at the balance sheet date, are determined on a collective basis.

Individual assessment

For individually assessed assets, the Santander UK group measures the amount of the loss as the difference between the carrying amount of the asset and the present value of the estimated future cash flows from the asset discounted at the asset's original effective interest rate.

The factors considered in determining whether a loan is individually significant for the purpose of assessing impairment include the size of the loan, the number of loans in the portfolio, the importance of the individual loan relationship and how this is managed. Potential indicators of loss events which may be evidence of impairment for retail borrowers may include missed payments of capital and interest and borrowers notifying the Santander UK group of current or likely financial stress.

For corporate assets, when a specific observed impairment is established, the asset is transferred to the Corporate & Commercial Banking Restructuring & Recoveries team. As part of their impairment reviews, an assessment is undertaken of the expected future cash flows (including, where appropriate, cash flows through enforcement of any applicable security held) in relation to the relevant asset, discounted at the loan's original effective interest rate. The result is compared to the current carrying value of the asset. Any shortfall evidenced as a result of such a review will be assessed and recorded as an observed specific loss allowance.

Collective assessment

In making a collective assessment for impairment, financial assets are grouped together according to their credit risk characteristics. These can include grouping by product, loan-to-value, brand, geography, type of customer and previous insolvency events. For each such portfolio or sub-segment of the portfolio, future cash flows are estimated through the use of historical loss experience. The historical loss experience is adjusted to include the effects of changes in current economic, behavioural and other conditions that cannot be successfully depicted solely from historical experience. The loss is discounted at the effective interest rate, except where portfolios meet the criteria for short-term receivables. The unwind of the discount over time is reported through interest and other similar income within the income statement, with an increase to the impairment loss allowances on the balance sheet. Loans for which evidence of potential loss have been specifically identified are grouped together for the purpose of calculating an allowance for observed losses. Loans for which no evidence of loss has been specifically identified on an individual basis are grouped together according to their credit risk characteristics for the purpose of calculating an allowance for incurred but not observed (IBNO) losses. Such losses will only be individually identified in the future.

Observed impairment loss allowance

An impairment loss allowance for observed losses is established for all NPLs where it is increasingly probable that some of the capital or interest will not be repaid or recovered through enforcement of any applicable security. The allowance for observed losses is determined on a collective (or portfolio) basis for groups of loans with similar credit risk characteristics. For more on the definition of NPLs, see 'Credit risk management - risk measurement and control' in the Risk review.

For mortgages and other secured advances, the allowance for observed losses is calculated as the product of the account outstanding balance (exposure) at the reporting date, the estimated proportion that will be repossessed (the loss propensity) and the percentage of exposure which will result in a loss (the loss ratio). The loss propensities for the observed segment (i.e. where the loan is classified as non-performing) represent the percentage that will ultimately be written off, or repossessed for secured advances. Loss propensities are based on recent historical experience, typically covering a period of no more than the most recent 12 months in the year under review. The loss ratio is based on actual cases which have been repossessed and sold using the most recent 12 month average data, segmented by LTV, and is then discounted using the effective interest rate.

IBNO impairment loss allowances

An allowance for IBNO losses is established for loans which are either:

The impairment loss calculation resembles the one explained above for the observed segment except that for the IBNO segment, where the account is currently up to date, the loss propensity represents the percentage of such cases that are expected to miss a payment in the appropriate emergence period and which will ultimately be written off. Where the account is delinquent, the loss propensity represents the percentage of such cases that will ultimately be written off.

b) Loans and receivables securities and held-to-maturity investments

Loans and receivables securities and held-to-maturity investments are assessed individually for impairment. An impairment loss is incurred if there is objective evidence that a loss event has occurred since initial recognition of the assets that has an impact on the estimated future cash flows of the asset. Potential indicators of loss events include significant financial distress of the issuer and default or delinquency in interest and principal payments (breach of contractual terms).

Loans and receivables securities and held-to-maturity investments are monitored for potential impairment through a detailed expected cash flow analysis, where appropriate, taking into account the structure and underlying assets of each individual security. Once specific events give rise to a reasonable expectation that future anticipated cash flows may not be received, the asset originating these doubtful cash flows will be deemed to be impaired with the impairment loss being measured as the difference between the expected future cash flows discounted at the original effective interest rate and the carrying value of the asset.

c) Assets classified as available-for-sale

The Santander UK group assesses at each balance sheet date whether there is objective evidence that an available-for-sale financial asset is impaired. The assessment involves reviewing the financial circumstances (including creditworthiness) and future prospects of the issuer, assessing the future cash flows expected to be realised and, in the case of equity shares, considering whether there has been a significant or prolonged decline in the fair value of the security below its cost. The cumulative loss is measured as the difference between the acquisition cost and the current fair value, less any impairment loss previously reported in the income statement and is removed from other comprehensive income and recognised in the income statement. For impaired debt instruments, further impairment losses are recognised where there has been a further negative impact on expected future cash flows.

If, in a subsequent period, the fair value of a debt instrument classified as available-for-sale increases and the increase is due to an event occurring after the impairment loss was recognised in the income statement (with objective evidence to support this), the impairment loss is reversed through the income statement. If, in a subsequent period, the fair value of an equity instrument classified as available-for-sale increases, all such increases in the fair value are treated as a revaluation, and are recognised in other comprehensive income. Impairment losses recognised on equity instruments are not reversed through the income statement.

CRITICAL JUDGEMENTS AND ACCOUNTING ESTIMATES

The preparation of the Consolidated Financial Statements requires management to make judgements and accounting estimates that affect the reported amount of assets and liabilities at the date of the Consolidated Financial Statements and the reported amount of income and expenses during the reporting period. Management evaluates its judgements and accounting estimates, which are based on historical experience and on various other factors that are believed to be reasonable under the circumstances, on an ongoing basis. Actual results may differ from these accounting estimates under different assumptions or conditions.

In the course of preparing the Consolidated Financial Statements, no significant judgements have been made in the process of applying the accounting policies, other than those involving estimations about credit impairment losses, conduct remediation and pensions as set out below.

The following accounting estimates, as well as the judgements inherent within them, are considered important to the portrayal of the Santander UK group's financial results and financial condition because: (i) they are highly susceptible to change from period to period as assumptions are made to calculate the estimates, and (ii) any significant difference between the estimated amounts and actual amounts could have a material impact on the Santander UK group's future financial results and financial condition.

In calculating each accounting estimate, a range of outcomes was calculated based principally on management's conclusions regarding the input assumptions relative to historical experience. The actual estimates were based on what management concluded to be the most probable assumptions within the range of reasonably possible assumptions.

a) Credit impairment allowance

The application of the ECL impairment methodology for calculating credit impairment allowances is highly susceptible to change from period to period. The methodology requires management to make a number of judgmental assumptions in determining the estimates. Any significant difference between the estimated amounts and actual amounts could have a material impact on the Santander UK group's future financial results and financial condition.

Key areas of judgement in accounting estimates

The key judgements made by management in applying the ECL impairment methodology are set out below.

For more on each of these key judgements, see the 'Credit risk - Santander UK group level - credit risk management' section of the Risk review.

Sensitivity of ECL allowance

At 31 December 2018, the probability-weighted ECL allowance totalled £807m, of which £789m related to exposures in Retail Banking, Corporate & Commercial Banking and Corporate Centre, and £18m related to exposures in Corporate & Investment Banking. The ECL allowance is sensitive to the methods, assumptions and estimates underlying its calculation. For example, management could have applied different probability weights to the economic scenarios and, depending on the weights chosen, this could have a material effect on the ECL allowance. In addition, the ECL allowance for residential mortgages, in particular, is significantly affected by the HPI assumptions which determine the valuation of collateral used in the calculations.

Had management used different assumptions on probability weights and HPI, a larger or smaller ECL charge would have resulted that could have had a material impact on the Santander UK group's reported ECL allowance and profit before tax. Sensitivities to these assumptions are set out below.

Probability weights

The amounts shown in the tables below illustrate the ECL allowances that would have arisen had management applied a 100% weighting to each economic scenario. The allowances were calculated using a stage allocation appropriate to each economic scenario presented and differs from the probability-weighted stage allocation used to determine the ECL allowance shown above. For exposures subject to individual assessment, the distribution of ECL which could reasonably be expected has also been considered, assuming no change in the number of cases subject to individual assessment, and within the context of a potential best to worst case outcome.

HPI

Given the relative size of our residential mortgage portfolio, management considers that changes in HPI assumptions underpinning the calculation of the ECL allowance for residential mortgages of £237m at 31 December 2018 would have the most significant impact on the ECL allowance. The table below shows the impact on profit before tax of applying an immediate and permanent house price increase / decrease to our base case economic scenario, and assumes no changes to the staging allocation of exposures:

b) Provisions

(i) PPI conduct remediation

The most critical factor in determining the level of PPI provision is the volume of claims that fall in scope for Santander UK. The uphold rate is informed by historical experience and the average cost of redress can be predicted reasonably accurately given that management is dealing with a high volume and reasonably homogeneous population. In setting the provision, management estimated the total claims that were likely to be received to the end of the time-bar period in August 2019.

Key areas of judgement in accounting estimates

The provision mainly represents management's best estimate of Santander UK's future liability in respect of misselling of PPI policies and Plevin complaints. It requires significant judgement by management in determining appropriate assumptions, which include the level of complaints expected to be received, of those, the number that will be upheld and redressed (reflecting legal and regulatory responsibilities, including the determination of liability and the effect of the time bar), as well as the redress costs for each of the different populations of customers identified. These are described in more detail in the 'PPI assumptions' section in Note 30.

Sensitivity of PPI conduct remediation provision

We made no additional provision charges for PPI conduct remediation relating to past activities and products sold recognised in 2018 (2017: £109m). The balance sheet provision amounted to £246m (2017: £356m). Detailed disclosures on the provision for PPI conduct remediation can be found in Note 30.

Had management used different assumptions, a larger or smaller provision charge would have resulted that could have had a material impact on the Santander UK group's reported profit before tax. Detailed disclosures on the assumptions used, including sensitivities, can be found in Note 30.

(ii) Other

As set out in Note 30, an amount of £58m (2017: £nil) was charged in 2018 and arose from a systems-related historical issue identified by Santander UK, relating to compliance with certain requirements of the Consumer Credit Act (CCA). This provision is based on detailed reviews of relevant systems related to consumer credit business operations, supported by external legal and regulatory advice, and reflects our best estimate at 31 December 2018 of potential costs in respect of the identified issue. However, as detailed in Note 32, these reviews and the related analysis are not yet complete, such that the approach and timing to any remediation has not yet been finalised, although it is expected to commence in 2019.

c) Pensions

The Santander UK group operates a number of defined benefit pension schemes as described in Note 31 and estimates their position as described in the accounting policy 'Pensions and other post retirement benefits'.

Key areas of judgement in accounting estimates

Accounting for defined benefit pension schemes requires management to make assumptions principally about the discount rate adopted, but also about price inflation, pension increases, life expectancy and earnings growth. Management's assumptions are based on past experience and current economic trends, which are not necessarily an indication of future experience. These are described in more detail in the 'Actuarial assumptions' section in Note 31.

Sensitivity of defined benefit pension scheme estimates

The defined benefit pension schemes which were in a net asset position at 31 December 2018 had a surplus of £842m (2017: £449m) and the defined benefit pension schemes which were in a net liability position at 31 December 2018 had a deficit of £114m (2017: £286m).

Had Management used different assumptions, a larger or smaller pension remeasurement gain or loss would have resulted that could have had a material impact on the Santander UK group's reported financial position. Detailed disclosures on the actuarial assumption sensitivities of the schemes can be found in the 'Actuarial assumption sensitivities' section in Note 31.

2. SEGMENTS

Santander UK's principal activity is financial services, mainly in the UK. The business is managed and reported on the basis of the following segments, which are strategic business units that offer different products and services, have different customers and require different technology and marketing strategies:

The segmental data below is presented in a manner consistent with the internal reporting to the committee which is responsible for allocating resources and assessing performance of the segments and has been identified as the chief operating decision maker. The segmental data is prepared on a statutory basis of accounting, in line with the accounting policies set out in Note 1. Transactions between segments are on normal commercial terms and conditions. Internal charges and internal UK transfer pricing adjustments are reflected in the results of each segment. Revenue sharing agreements are used to allocate external customer revenues to a segment on a reasonable basis. Funds are ordinarily reallocated between segments, resulting in funding cost transfers disclosed in operating income. Interest charged for these funds is based on Santander UK's cost of wholesale funding. Interest income and interest expense have not been reported separately. The majority of segment revenues are interest income in nature and net interest income is relied on primarily to assess segment performance and to make decisions on the allocation of segment resources.

The segmental basis of presentation in this Annual Report has been changed, and prior periods restated, to report our Jersey and Isle of Man branches in Corporate Centre rather than in Retail Banking as in previous years, as a result of their transfer from Santander UK plc to ANTS in December 2018. Prior periods have not been restated for the changes in our statutory perimeter in the third quarter of 2018, following the ring-fence transfers to Banco Santander London Branch, as described in Note 43.

Results by segment