Holding(s) in Company

For filings with the FCA 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 issuerof 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 x An acquisition or disposal of qualifying financial instruments which may resultin the acquisition of shares already issued to which voting rights are attached An acquisition or disposal of instruments with similar economic effect toqualifying financial instruments An event changing the breakdown of voting rights Other (please specify): 3. Full name of person(s) subject to the Baillie Gifford & Conotification obligation:iii 4. Full name of shareholder(s) (if different from 3.):iv 5. Date of the transaction and date onwhich the threshold is crossed or 16th Aug 2013reached: v 6. Date on which issuer notified: 19th Aug 2013 7. Threshold(s) that is/are crossed or 5%reached: vi, vii 8. Notified details: A: Voting rights attached to shares viii, ix Class/type Situation previous Resulting situation after the triggering transactionof to the triggeringshares transaction Number Number Number Number of voting % of voting rightsif possible of of of shares rights xusing Shares Votingthe ISIN Rights Direct Direct xi Indirect Direct IndirectCODE xii OrdinaryShare 3251556 3251556 Below 5% Below 5% Below 5% GB0004866223 B: Qualifying Financial Instruments Resulting situation after the triggering transaction Type of Expiration Exercise/ Number of voting % of votingfinancial date xiii Conversion Period xiv rights that may be rightsinstrument acquired if the instrument is exercised/ converted. N/A C: Financial Instruments with similar economic effect to Qualifying FinancialInstruments xv, xvi Resulting situation after the triggering transaction Type of Exercise Expiration Exercise/ Number of voting rights % of votingfinancial price date xvii Conversion instrument refers to rights xix, xxinstrument period xviii Nominal DeltaN/A Total (A+B+C) Number of voting rights Percentage of voting rights Below 5% Below 5% 9. Chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held, if applicable: xxi In the narrative below, the figures in 8 indicate the amount of voting rightsand the percentage held by each controlled undertaking where relevant. Baillie Gifford & Co, a discretionary investment manager, is the parentundertaking of an investment management group. Its wholly-owned subsidiary undertaking Baillie Gifford Overseas Limited [below5%] is also a discretionary investment manager. Its wholly-owned subsidiary undertaking Baillie Gifford & Co Limited [below 5%]is an OEIC Authorised Corporate Director and Unit Trust Manager which hasdelegated its discretionary investment management role to Baillie Gifford & Co. Its wholly-owned subsidiary undertaking Baillie Gifford Life Limited [below 5%]is a life assurance company which procures discretionary investment managementservices from Baillie Gifford & Co in respect of its own account shareholdings. Proxy Voting: 10. Name of the proxy holder: N/A 11. Number of voting rights proxy holder will ceaseto hold: 12. Date on which proxy holder will cease to holdvoting rights: 13. Additional information: 14. Contact name: Susie McBay 15. Contact telephone number: 0131 2753032