Keller Regulatory News (KLR)

24 May 2010 10:12

For filings with the FSA include the annex For filings with issuer exclude the annex TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi 1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are Keller Group PLCattached:ii 2 Reason for the notification (please tick the appropriate box or boxes): An acquisition or disposal of voting rights

An acquisition or disposal of qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments An event changing the breakdown of voting rights Other (please specify): 3. Full name of person(s) subject to the BlackRock, Inc. notification obligation:iii 4. Full name of shareholder(s) (if different from 3.):iv 5. Date of the transaction and date on which the threshold is crossed or 19th May 2010 reached: v 6. Date on which issuer notified: 21st May 2010 7. Threshold(s) that is/are crossed or Holding has gone below 13%reached: vi, vii 8. Notified details: A: Voting rights attached to shares viii, ix

Class/type Situation previous Resulting situation after the triggering transaction of

to the triggering shares transaction Number Number Number Number of voting % of voting rights x if possible of of of shares rights using Shares Voting the ISIN Rights Direct Direct xi Indirect Direct Indirect CODE xii GB0004866223 6,597,788 6,597,788 N/A N/A 6,540,266 N/A 10.171% B: Qualifying Financial Instruments Resulting situation after the triggering transaction Type of Expiration Exercise/ Number of voting % of voting financial date xiii Conversion Period rights that may be rights instrument xiv acquired if the instrument is exercised/ converted. C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi Resulting situation after the triggering transaction Type of Exercise price Expiration Exercise/ Number of voting rights % of voting rightsfinancial date xvii Conversion instrument refers to xix, xx instrument period xviii Nominal Delta CFD 1,817,401 2.826% 2.826% Total (A+B+C) Number of voting rights Percentage of voting rights 8,357,667 12.997%

9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable: xxi

BlackRock Investment Management (UK) Limited - 8,357,667 (12.997%) Proxy Voting: 10. Name of the proxy holder: 11. Number of voting rights proxy holder will cease to hold: 12. Date on which proxy holder will cease to hold voting rights: BlackRock Threshold Reporting Team 13. Additional information: 14. Contact name: Stuart Watchorn 15. Contact telephone number: 020 7743 5741; stuart.watchorn@blackrock.com

Note: Annex should only be submitted to the FSA not the issuer Annex: Notification of major interests in sharesxxii A: Identity of the persons or legal entity subject to the notification obligation Full name (including legal form of legal entities) BlackRock, Inc. Contact address 33 King William Street, (registered office for legal entities) London, EC4R 9AS Phone number & email 020 7743 5741; stuart.watchorn@blackrock.com Other useful information (at least legal representative for legal persons) Stuart Watchorn B: Identity of the notifier, if applicable Full name Contact address Phone number & email Other useful information (e.g. functional relationship with the person or legal entity subject to the notification obligation) C: Additional information

For notes on how to complete form TR-1 please see the FSA website.