Notification of Major Interests in Shares

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 Keller Group plc issuer of existing shares to which voting rights are attached: ii 2 Reason for the notification (please tick the appropriate box or boxes): An acquisition or disposal of voting rights Yes 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 Barclays Global Investors the notification obligation: iii 4. Full name of shareholder(s) (if different from 3.):iv 5. Date of the transaction and date 24 August 2009 on which the threshold is crossed or reached: v 6. Date on which issuer notified: 25 August 2009 7. Threshold(s) that is/are crossed 3% to below notifiable % or reached: vi, vii 8. Notified details: A: Voting rights attached to shares viii, ix Class/type of Situation previous Resulting situation after shares to the triggering the triggering transaction transaction if possible Number Number Number Number of % of voting using of of of shares voting rights x the ISIN CODE Shares Voting rights Rights Direct Direct xi Indirect Direct Indirect xii GB0004866223 1,699,020 1,699,020 Not Not Not Not Not Reportable Reportable Reportable Reportable Reportable B: Qualifying Financial Instruments Resulting situation after the triggering transaction Type of financial Expiration Exercise/ Number of voting % of voting instrument date xiii Conversion Period xiv rights that may be rights 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 Expiration Exercise/ Number of voting % of voting financial price date xvii Conversion rights instrument rights xix, xx instrument period refers to xviii Nominal Delta Total (A+B+C) Number of voting rights Percentage of voting rights Not Reportable Not Reportable 9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable: xxi 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: 13. Additional information: 14. Contact name: Geoff Smith 15. Contact telephone number: 02071162913 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) Contact address (registered office for legal entities) Phone number & email Other useful information (at least legal representative for legal persons) 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.