TR-1: Notifications of Major Interests in SharesIdentity of the issuer or the underlying issuer of existing shares to Keller Groupwhich voting rights are attached: PLC2: Reason for notification (yes/no)An acquisition or disposal of voting rights yesAn acquisition or disposal of qualifying financial instruments which may result noin the acquisition of shares already issued to which voting rights are attachedAn acquisition or disposal of instruments with similar economic effect to noqualifying financial instrumentsAn event changing the breakdown of voting rights noOther (please specify): no Standard Life Investments (Holdings) Limited3. Full name of person(s) subject to the (Parent Company) -8.785% comprised of:notification Standard Life Investments Limited - 8.626% obligation: Ignis Investment Services Limited - 0.159%4. Full name of shareholder(s) (if Vidacos Nominees\HSBCdifferent from 3.):5. Date of the transaction (and date onwhich the threshold 13/03/2015is crossed or reached):6. Date on which issuer notified: 16/03/20157. Threshold(s) that is/are crossed or 9%reached:8: Notified DetailsVoting rights attached to sharesClass/type of share If possible use ISIN code GB0004866223Situation previous to the triggering transactionNumber of shares Number of voting rights6,444,372 6,444,372Resulting situation after the triggering transactionNumber of shares Number of voting rights Percentage of voting rights Direct Indirect Direct Indirect6,261,390 1,255,218 5,006,172 1.761 7.024Qualifying Financial InstrumentsResulting situation after the triggering transactionType of Expiration Exercise/ No. of voting rights Percentage offinancial date conversion period/ that may be acquired voting rightsinstrument date (if the instrument exercised/converted)C: Financial Instruments with similar economic effect to Qualifying FinancialInstrumentsResulting situation after the triggering transactionType of financial Exercise Expiration Exercise/ Number of voting % of voting rightsinstrument price date Conversion rights instrument period refers to Nominal DeltaTotal (A+B+C)Number of voting rights Percentage of voting rights6,261,390 8.7859. Chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held, if applicable:Standard Life Investments (Holdings) Limited (Parent Company) -8.785% comprisedof:Standard Life Investments Limited - 8.626%Ignis Investment Services Limited - 0.159%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: Notification using the total voting rights figure of 71,269,81314. Contact name: Kerry Porritt Group Company Secretary15. Contact telephonenumber: 0207 616 7575