Block listing Interim Review

Centrica plc (the ‘Company’)

3 November 2025

BLOCK LISTING SIX MONTHLY RETURN

Schedule 5

Date: 3 November 2025

Name of applicant:

Centrica plc

Name of scheme:

Centrica Sharesave Scheme

Period of return:

From:

1 May 2025

To:

31 October 2025

Balance of unallotted securities under scheme(s) from previous return:

9,798,349 ORDINARY 6 14/81p

Plus: The amount by which the block scheme(s) has been increased since the date of the last return (if any increase has been applied for):

0

Less: Number of securities issued/allotted under scheme(s) during period (see LR3.5.7G):

0

Equals: Balance under scheme(s) not yet issued/allotted at end of period:

9,798,349 ORDINARY 6 14/81p

Name of contact:

Taneth Washington

Telephone number of contact:

+44 (0)1753 494000

BLOCK LISTING SIX MONTHLY RETURN

Schedule 5

Date: 3 November 2025

Name of applicant:

Centrica plc

Name of scheme:

Centrica Share Incentive Plan

Period of return:

From:

1 May 2025

To:

31 October 2025

Balance of unallotted securities under scheme(s) from previous return:

13,798,332 ORDINARY 6 14/81p

Plus: The amount by which the block scheme(s) has been increased since the date of the last return (if any increase has been applied for):

0

Less: Number of securities issued/allotted under scheme(s) during period (see LR3.5.7G):

0

Equals: Balance under scheme(s) not yet issued/allotted at end of period:

13,798,332 ORDINARY 6 14/81p

Name of contact:

Taneth Washington

Telephone number of contact:

+44 (0)1753 494000

BLOCK LISTING SIX MONTHLY RETURN

Schedule 5

Date: 3 November 2025

Name of applicant:

Centrica plc

Name of scheme:

Centrica On Track Incentive Plan (incorporating the Centrica Conditional Share Incentive Plan)

Period of return:

From:

1 May 2025

To:

31 October 2025

Balance of unallotted securities under scheme(s) from previous return:

42,341,464 ORDINARY 6 14/81p

Plus: The amount by which the block scheme(s) has been increased since the date of the last return (if any increase has been applied for):

0

Less: Number of securities issued/allotted under scheme(s) during period (see LR3.5.7G):

0

Equals: Balance under scheme(s) not yet issued/allotted at end of period:

42,341,464 ORDINARY 6 14/81p

Name of contact:

Taneth Washington

Telephone number of contact:

+44 (0)1753 494000

BLOCK LISTING SIX MONTHLY RETURN

Schedule 5

Date: 3 November 2025

Name of applicant:

Centrica plc

Name of scheme:

Centrica Long Term Incentive Plan

Period of return:

From:

1 May 2025

To:

31 October 2025

Balance of unallotted securities under scheme(s) from previous return:

1,200,000 ORDINARY 6 14/81p

Plus: The amount by which the block scheme(s) has been increased since the date of the last return (if any increase has been applied for):

0

Less: Number of securities issued/allotted under scheme(s) during period (see LR3.5.7G):

0

Equals: Balance under scheme(s) not yet issued/allotted at end of period:

1,200,000 ORDINARY 6 14/81p

Name of contact:

Taneth Washington

Telephone number of contact:

+44 (0)1753 494000

Centrica plc is listed on the London Stock Exchange (CNA)Registered Office: Millstream, Maidenhead Road, Windsor, Berkshire SL4 5GD

Registered in England & Wales number: 3033654Legal Entity Identifier number: E26EDV109X6EEPBKVH76ISIN number: GB00B033F229