Blocklisting - Interim Review

BLOCK LISTING SIX MONTHLY RETURN                        

Information provided on this form must be typed or printed electronically and
provided to an ris.

Date: 17 July 2008

Name of applicant:                     Keller Group plc                        
                                                                               
Name of scheme:                        Keller Group plc Performance Share Plan 
                                                                               
Period of return:            From:     01/01/2008      To:    30/06/2008       
                                                                               
Balance of unallotted securities under 371,500 Ordinary 10p Shares             
scheme(s) from previous return:                                                
                                                                               
Plus: The amount by which the block    n/a                                     
scheme(s) has been increased since the                                         
date of the last return (if any                                                
increase has been applied for):                                                
                                                                               
Less: Number of securities issued/     nil                                     
allotted under scheme(s) during period                                         
(see LR3.5.7G):                                                                
                                                                               
Equals: Balance under scheme(s) not    371,500 Ordinary 10p Shares             
yet issued/allotted at end of period:                                          
                                                                               
Name of contact:                       Jackie Holman                           
                                                                               
Telephone number of contact:           020 7616 7575