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 Approved Company Share 
                                       Option Plan and Keller Group plc        
                                       Unapproved Company Share Option Plan    
                                                                               
Period of return:            From:     01/01/2008      To:    30/06/2008       
                                                                               
Balance of unallotted securities under 2,328,500 ordinary 10p shares           
scheme(s) from previous return:        outstanding under block listing scheme. 
                                                                               
                                       (988,000 ordinary 10p shares outstanding
                                       under share option plans (of which,     
                                       742,000 lapsed))                        
                                                                               
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/     33,000                                  
allotted under scheme(s) during period                                         
(see LR3.5.7G):                                                                
                                                                               
Equals: Balance under scheme(s) not    2,295,500                               
yet issued/allotted at end of period:                                          
                                                                               
Name of contact:                       Jackie Holman                           
                                                                               
Telephone number of contact:           020 7616 7575