Blocklisting - Interim Review

Block Listing Six Monthly Return Information provided on this form must be typed or printed electronically andprovided to an ris. Date: 1 July 2013 Name of applicant: Keller Group plc Name of scheme: Keller Group plc Approved Company Share Option Plan and Keller Group plc Unapproved Company Share Option Plan Period of return: From: 01/01/2013 To: 30/06/2013 Balance of unallotted securities underscheme(s) from previous return: 2,108,000 ordinary 10p shares outstanding under block listing scheme. There are no options outstanding under these plans, which have now expired. Plus: The amount by which the block n/ascheme(s) has been increased since thedate of the last return (if anyincrease has been applied for): Less: Number of securities issued/ n/aallotted under scheme(s) during period(see LR3.5.7G): Equals: Balance under scheme(s) not 2,108,000yet issued/allotted at end of period: Name of contact: Jackie Holman Telephone number of contact: 020 7616 7575 Name of applicant: Keller Group plc Name of scheme: Keller Group plc Performance Share Plan Period of return: From: 01/01/2013 To: 30/06/2013 Balance of unallotted securities under 371,500 ordinary 10p sharesscheme(s) from previous return: Plus: The amount by which the block n/ascheme(s) has been increased since thedate of the last return (if any increasehas been applied for): Less: Number of securities issued/ nilallotted under scheme(s) during period(see LR3.5.7G): Equals: Balance under scheme(s) not yet 371,500 ordinary 10p sharesissued/allotted at end of period: Name of contact: Jackie Holman Telephone number of contact: 020 7616 7575