Blocklisting - Interim Review

BLOCK LISTING SIX MONTHLY RETURN                        

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

To: The FSA

Date: 29 November 2006

Name of applicant:                     Serco Group plc                         
                                                                               
Name of scheme:                        Executive Share Option Plan             
                                                                               
Period of return:            From:     20 October 2004 To:    19 April 2005    
                                                                               
Balance under scheme from previous     408,700                                 
return:                                                                        
                                                                               
The amount by which the block scheme   2,500,000 ordinary shares on 27 November
has been increased, if the scheme has  2006                                    
been increased since the date of the                                           
last return:                                                                   
                                                                               
Number of securities issued/allotted   222,841                                 
under scheme during period:                                                    
                                                                               
Balance under scheme not yet issued/   2,685,859                               
allotted at end of period                                                      
                                                                               
Number and class of securities         477,356 - 3 September 2001              
originally listed and the date of                                              
admission                              2,500,000 - 27 November 2006            
                                                                               
Total number of securities in issue at 465,853,849                             
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 ______________________________________________

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: 29 November 2006

Name of applicant:                     Serco Group plc                         
                                                                               
Name of scheme:                        Long Term Incentive Scheme              
                                                                               
Period of return:            From:     20 October 2004 To:    19 April 2005    
                                                                               
Balance under scheme from previous     133,913                                 
return:                                                                        
                                                                               
The amount by which the block scheme   500,000 ordinary shares on 27 November  
has been increased, if the scheme has  2006                                    
been increased since the date of the                                           
last return:                                                                   
                                                                               
Number of securities issued/allotted   Nil                                     
under scheme during period:                                                    
                                                                               
Balance under scheme not yet issued/   633,913                                 
allotted at end of period                                                      
                                                                               
Number and class of securities         685,690 - 10 October 2000               
originally listed and the date of                                              
admission                              42,444 - 3 September 2001               
                                                                               
                                       500,000 - 27 November 2006              
                                                                               
Total number of securities in issue at 465,853,849                             
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 ______________________________________________

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: 29 November 2006

Name of applicant:                     Serco Group plc                         
                                                                               
Name of scheme:                        Savings Related Share Option Scheme     
                                                                               
Period of return:            From:     20 October 2004 To:    19 April 2005    
                                                                               
Balance under scheme from previous     130,507                                 
return:                                                                        
                                                                               
The amount by which the block scheme   3,000,000 ordinary shares on 27 November
has been increased, if the scheme has  2006                                    
been increased since the date of the                                           
last return:                                                                   
                                                                               
Number of securities issued/allotted   19,344                                  
under scheme during period:                                                    
                                                                               
Balance under scheme not yet issued/   3,111,163                               
allotted at end of period                                                      
                                                                               
Number and class of securities         440,000 on 31 March 2000                
originally listed and the date of                                              
admission                              52,845 - 25 April 2000                  
                                                                               
                                       50,000 - 19 October 2000                
                                                                               
                                       3,000,000 - 27 November 2006            
                                                                               
Total number of securities in issue at 4465,853,849                            
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 ______________________________________________
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.