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: 4 July 2011

Name of applicant:                     Serco Group plc                         
                                                                               
Name of scheme:                        a. Long Term Incentive Scheme           
                                                                               
                                       b. Savings Related Share Option Scheme  
                                                                               
                                       c. Executive Option Plan                
                                                                               
Period of return:            From:     1 January 2011  To:    30 June 2011     
                                                                               
Balance of unallotted securities under a. 394,936 ordinary 2p shares           
scheme(s) from previous return:                                                
                                       b. 212,948 ordinary 2p shares           
                                                                               
                                       c. 232,980 ordinary 2p shares           
                                                                               
Plus: The amount by which the block    a. Nil                                  
scheme(s) has been increased since the                                         
date of the last return (if any        b. 630,000 ordinary 2p shares           
increase has been applied for):                                                
                                       c. Nil                                  
                                                                               
Less: Number of securities issued/     a. 38,929 ordinary 2p shares            
allotted under scheme(s) during period                                         
(see LR3.5.7G):                        b. 125,249 ordinary 2p shares           
                                                                               
                                       c. 68,584 ordinary 2p shares            
                                                                               
Equals: Balance under scheme(s) not    a. 356,007 ordinary 2p shares           
yet issued/allotted at end of period:                                          
                                       b. 717,699 ordinary 2p shares           
                                                                               
                                       c. 164,396 ordinary 2p shares           

Name of contact:                        Emma Penn                              
                                                                               
Telephone number of contact:            01256 744168