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: 1 July 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 January 2010  To:    30 June 2010     
                                                                               
Balance of unallotted securities under a. 298,271 ordinary 2p shares           
scheme(s) from previous return:                                                
                                       b. 27,934 ordinary 2p shares            
                                                                               
                                       c. 1,249,051 ordinary 2p shares         
                                                                               
Plus: The amount by which the block    a. 1,010,000 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. 1,040,715 ordinary 2p shares         
allotted under scheme(s) during period                                         
(see LR3.5.7G):                        b. 20,109 ordinary 2p shares            
                                                                               
                                       c. 895,911 ordinary 2p shares           
                                                                               
Equals: Balance under scheme(s) not    a. 267,556 ordinary 2p shares           
yet issued/allotted at end of period:                                          
                                       b. 7,825 ordinary 2p shares             
                                                                               
                                       c. 353,140 ordinary 2p shares           

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