Holding(s) in Company

TR-1: Notifications of Major Interests in Shares 1. Identity of the issuer or the Keller Group PLC underlying issuer of existing shares to which voting rights are attached: 2: Reason for notification (yes/no) An acquisition or disposal of voting rights yes An acquisition or disposal of qualifying financial instruments which nomay result in the acquisition of shares already issued to whichvoting rights are attached An acquisition or disposal of instruments with similar economic noeffect to qualifying financial instruments An event changing the breakdown of voting rights no Other (please specify): no 3. Full name of person(s) subject to the Standard Life Investments (Holdings)notification Limited (Parent Company) -9.217% comprised of:obligation: Standard Life Investments Limited - 8.994% Ignis Investment Services Limited - 0.223% 4. Full name of shareholder(s) (if Vidacos Nominees\HSBCdifferent from 3.): 5. Date of the transaction (and date on 22/12/2014which the threshold is crossed or reached): 6. Date on which issuer notified: 23/12/2014 7. Threshold(s) that is/are crossed or 9%reached: 8: Notified Details A. Voting rights attached to shares * Class/type of share If possible GB0004866223 use ISIN code Situation previous to the triggering transaction * Number of shares * Number of voting rights 6,215,407 6,215,407 Resulting situation after the triggering transaction * Number of Number of voting rights Percentage of shares voting rights Direct Indirect Direct Indirect 6,568,407 1,211,681 5,356,726 1.700 7.517 B. Qualifying Financial Instruments Resulting situation after the triggering transaction Type of Expiration Exercise/ No. of voting Percentage offinancial date conversion rights that may voting rightsinstrument period/date be acquired (if the instrument exercised/ converted) NominalDelta C: Financial Instruments with similar economic effect to Qualifying Financial Instruments Resulting situation after the triggering transaction Type of financial Exercise Expiration Exercise/ Number of % of votinginstrument price date Conversion voting rights period rights instrument refers to Total (A+B+C) Number of voting rights Percentage of voting rights 6,568,407 9.217 9. 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) -9.217% comprisedof: Standard Life Investments Limited - 8.994% Ignis Investment Services Limited - 0.223% Proxy Voting: 10. Name of the proxy holder: 11. Number of voting rights proxy holderwill cease to hold: 12. Date on which proxy holder will cease tohold voting rights: 13. Additional information: Notification using the total voting rights figure of 71,259,813 14. Contact name: Kerry Porritt Group Company Secretary 15. Contact telephone number: 0207 616 7575