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 April 2004   To:    19 October 2004  
                                                                               
Balance under scheme from previous     572,202                                 
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   163,502                                 
under scheme during period:                                                    
                                                                               
Balance under scheme not yet issued/   408,700                                 
allotted at end of period                                                      
                                                                               
Number and class of securities         477,356 Ordinary Shares on 3 September  
originally listed and the date of      2001                                    
admission                                                                      
                                                                               
Total number of securities in issue at 435,282,645                             
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 April 2004   To:    19 October 2004  
                                                                               
Balance under scheme from previous     477,783                                 
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   133,913                                 
under scheme during period:                                                    
                                                                               
Balance under scheme not yet issued/   343,870                                 
allotted at end of period                                                      
                                                                               
Number and class of securities         685,690 10 October 2000                 
originally listed and the date of                                              
admission                              42,444 on 3 September 2001              
                                                                               
Total number of securities in issue at 435,282,645                             
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 April 2004   To:    19 October 2004  
                                                                               
Balance under scheme from previous     130,594                                 
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   87                                      
under scheme during period:                                                    
                                                                               
Balance under scheme not yet issued/   130,507                                 
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                
                                                                               
Total number of securities in issue at 435,282,645                             
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.