Blocklisting - Interim Review

BLOCK LISTING SIX MONTHLY RETURN                        

Information provided on this form must be typed or printed electronically.

To: The FSA

Date: 22 October 2007

Name of applicant:                     Serco Group plc                         
                                                                               
Name of scheme:                        Long Term Incentive Scheme              
                                                                               
Period of return:            From:     20 April 2007   To:    19 October 2007  
                                                                               
Balance under scheme from previous     295,491                                 
return:                                                                        
                                                                               
The amount by which the block scheme   N/A                                     
has been increased, if the scheme has                                          
been increased since the date of the                                           
last return:                                                                   
                                                                               
Number of securities issued/allotted   14,490                                  
under scheme during period:                                                    
                                                                               
Balance under scheme not yet issued/   281,001                                 
allotted at end of period                                                      
                                                                               
Number and class of securities         500,000 - 27 November 2006              
originally listed and the date of                                              
admission                                                                      
                                                                               
Total number of securities in issue at 484,342,221                             
the end of the period                                                          

Name of contact:                        Jayne Deegan                           
                                                                               
Address of contact:                     Serco House, 16 Bartley Wood Business  
                                        Park, Bartley Way, Hook, Hampshire,    
                                        RG27 9UY                               
                                                                               
Telephone number of contact:            01256 744272                           

SIGNED BY ______________________________________________

[DEL:Director:DEL][DEL:/company secretary:DEL]/suitably experienced employee/
[DEL:duly authorised officer:DEL],

for and on behalf of

Serco Group plc

Name of applicant

If you knowingly or recklessly give false or misleading information you may be
liable to prosecution.

                       BLOCK LISTING SIX MONTHLY RETURN                        

Information provided on this form must be typed or printed electronically.

To: The FSA

Date: 22 October 2007

Name of applicant:                     Serco Group plc                         
                                                                               
Name of scheme:                        Savings Related Share Option Scheme     
                                                                               
Period of return:            From:     20 April 2007   To:    19 October 2007  
                                                                               
Balance under scheme from previous     3,086,244                               
return:                                                                        
                                                                               
The amount by which the block scheme   2,430,000 on 30 May 2007                
has been increased, if the scheme has                                          
been increased since the date of the                                           
last return:                                                                   
                                                                               
Number of securities issued/allotted   5,446,183                               
under scheme during period:                                                    
                                                                               
Balance under scheme not yet issued/   70,061                                  
allotted at end of period                                                      
                                                                               
Number and class of securities         3,000,000 - 27 November 2006            
originally listed and the date of                                              
admission                              366,403 - 18 March 1999                 
                                                                               
Total number of securities in issue at 484,342,221                             
the end of the period                                                          

Name of contact:                        Jayne Deegan                           
                                                                               
Address of contact:                     Serco House, 16 Bartley Wood Business  
                                        Park, Bartley Way, Hook, Hampshire,    
                                        RG27 9UY                               
                                                                               
Telephone number of contact:            01256 744272                           

SIGNED BY ______________________________________________

[DEL:Director:DEL][DEL:/company secretary:DEL]/suitably experienced employee/
[DEL:duly authorised officer:DEL],

for and on behalf of

Serco Group plc

Name of applicant

If you knowingly or recklessly give false or misleading information you may be
liable to prosecution.

BLOCK LISTING SIX MONTHLY RETURN

Information provided on this form must be typed or printed electronically.

To: The FSA

Date: 22 October 2007

Name of applicant:                     Serco Group plc                         
                                                                               
Name of scheme:                        Executive Share Option Plan             
                                                                               
Period of return:            From:     20 April 2007   To:    19 October 2007  
                                                                               
Balance under scheme from previous     4,651,445                               
return:                                                                        
                                                                               
The amount by which the block scheme   570,000 on 30 May 2007                  
has been increased, if the scheme has                                          
been increased since the date of the                                           
last return:                                                                   
                                                                               
Number of securities issued/allotted   1,042,590                               
under scheme during period:                                                    
                                                                               
Balance under scheme not yet issued/   4,178,855                               
allotted at end of period                                                      
                                                                               
Number and class of securities         10,000,000 - 29 March 2007              
originally listed and the date of                                              
admission                              4,406,612 - 3 February 2005             
                                                                               
Total number of securities in issue at 484,342,221                             
the end of the period                                                          

Name of contact:                        Jayne Deegan                           
                                                                               
Address of contact:                     Serco House, 16 Bartley Wood Business  
                                        Park, Bartley Way, Hook, Hampshire,    
                                        RG27 9UY                               
                                                                               
Telephone number of contact:            01256 744272                           

SIGNED BY ______________________________________________

[DEL:Director:DEL][DEL:/company secretary:DEL]/suitably experienced employee/
[DEL:duly authorised officer:DEL],

for and on behalf of

Serco Group plc

Name of applicant

If you knowingly or recklessly give false or misleading information you may be
liable to prosecution.