Blocklisting - Interim Review

BLOCK LISTING SIX MONTHLY RETURN                        

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

To: The FSA

Date: 12 April 2007

Name of applicant:                     Serco Group plc                         
                                                                               
Name of scheme:                        Long Term Incentive Scheme              
                                                                               
Period of return:            From:     20 October 2006 To:    19 April 2007    
                                                                               
Balance under scheme from previous     298,618                                 
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   2,592                                   
under scheme during period:                                                    
                                                                               
Balance under scheme not yet issued/   295,491                                 
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                                         
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 2006 To:    19 April 2007    
                                                                               
Balance under scheme from previous     2,944,637                               
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   224,796                                 
under scheme during period:                                                    
                                                                               
Balance under scheme not yet issued/   2,719,841                               
allotted at end of period                                                      
                                                                               
Number and class of securities         3,000,000 - 27 November 2006            
originally listed and the date of                                              
admission                                                                      
                                                                               
Total number of securities in issue at                                         
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: 19 October 2006

Name of applicant:                     Serco Group plc                         
                                                                               
Name of scheme:                        Executive Share Option Plan             
                                                                               
Period of return:            From:     20 April 2006   To:    19 October 2006  
                                                                               
Balance under scheme from previous     Nil                                     
return:                                                                        
                                                                               
The amount by which the block scheme   10,000,000                              
has been increased, if the scheme has                                          
been increased since the date of the                                           
last return:                                                                   
                                                                               
Number of securities issued/allotted   7,643,367                               
under scheme during period:                                                    
                                                                               
Balance under scheme not yet issued/   2,356,633                               
allotted at end of period                                                      
                                                                               
Number and class of securities         2,500,000 - 27 November 2006            
originally listed and the date of                                              
admission                              10,000,000 - 29 March 2007              
                                                                               
Total number of securities in issue at 475,619,545                             
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: 12 April 2007

Name of applicant:                     Serco Group plc                         
                                                                               
Name of scheme:                        Executive Share Option Plan             
                                                                               
Period of return:            From:     20 October 2006 To:    19 April 2007    
                                                                               
Balance under scheme from previous     2,356,633                               
return:                                                                        
                                                                               
The amount by which the block scheme                                           
has been increased, if the scheme has                                          
been increased since the date of the                                           
last return:                                                                   
                                                                               
Number of securities issued/allotted   1,989,341                               
under scheme during period:                                                    
                                                                               
Balance under scheme not yet issued/   244,833                                 
allotted at end of period                                                      
                                                                               
Number and class of securities         10,000,000 - 29 March 2007              
originally listed and the date of                                              
admission                                                                      
                                                                               
Total number of securities in issue at                                         
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.