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 January 2010

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 July 2009     To:    31 December 2009 
                                                                               
Balance of unallotted securities under a. 88,752 ordinary 2p shares            
scheme(s) from previous return:                                                
                                       b. 32,489 ordinary 2p shares            
                                                                               
                                       c. 2,424,479 ordinary 2p shares         
                                                                               
Plus: The amount by which the block    a. 1,490,000 ordinary 2p shares         
scheme(s) has been increased since the                                         
date of the last return (if any        b. nil                                  
increase has been applied for):                                                
                                       c. nil                                  
                                                                               
Less: Number of securities issued/     a. 1,280,481 ordinary 2p shares         
allotted under scheme(s) during period                                         
(see LR3.5.7G):                        b. 4,555 ordinary 2p shares             
                                                                               
                                       c. 1,175,428 ordinary 2p shares         
                                                                               
Equals: Balance under scheme(s) not    a. 298,271 ordinary 2p shares           
yet issued/allotted at end of period:                                          
                                       b. 27,934 ordinary 2p shares            
                                                                               
                                       c. 1,249,051 ordinary 2p shares         

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