Annual Information Update

Serco Group plc

Annual Information Update - 10 April 2005 to 11 April 2006

This information is provided in accordance with Prospectus Rule 5.2.1. The

information referred to below was up to date at the time of publication but
some

information may now be out of date.

Title          Where the       Description     Date and     Date of          
               Document can be                 place of     Publication      
               Viewed.                         Filing                        
                                                                             
AGM Statement  Company Website AGM Statement   29.04.05     29.04.05         
               : www.serco.com                 London Stock                  
                                               Exchange                      
                                                                             
Director       Company Website Increase in     29.04.05     29.04.05         
Shareholding   : www.serco.com Directors'      London Stock                  
                               Shareholding    Exchange                      
                               for Kevin                                     
                               Beeston,                                      
                               Christopher                                   
                               Hyman & Andrew                                
                               Jenner                                        
                                                                             
Result of AGM  Company Website Result of AGM   29.04.05     29.04.05         
               : www.serco.com                 London Stock                  
                                               Exchange                      
                                                                             
Director       Company Website Increase in     17.05.05     17.05.05         
Shareholding   : www.serco.com Directors'      London Stock                  
                               shareholding    Exchange                      
                               for Christopher                               
                               Hyman                                         
                                                                             
Statement      Company Website Serco Group plc 16.06.05     16.06.05         
               : www.serco.com is hosting a    London Stock                  
                               seminar on its  Exchange                      
                               Transport                                     
                               business                                      
                                                                             
Holding(s) in  Company Website Morley Fund     23.06.05     23.06.05         
Company        : www.serco.com Management      London Stock                  
                               Limited no      Exchange                      
                               longer held a                                 
                               notifiable                                    
                               interest in                                   
                               Serco Group                                   
                               plc.                                          
                                                                             
Pre-Close      Company Website Pre-Close       27.06.05     27.06.05         
Trading Update : www.serco.com Trading Update  London Stock                  
                                               Exchange                      
                                                                             
Contract Award Company Website Serco Group plc 30.06.05     30.06.05         
               : www.serco.com Chosen By IBM   London Stock                  
                               To Implement    Exchange                      
                               Bradford                                      
                               Council's IT                                  
                                                                             
Holding(s) in  Company Website FMR Corp. and   20.07.05     20.07.05         
Company        : www.serco.com its direct and  London Stock                  
                               indirect        Exchange                      
                               subsidiaries,                                 
                               and Fidelity                                  
                               International                                 
                               Limited and its                               
                               direct and                                    
                               indirect                                      
                               subsidiaries.                                 
                               5.83%                                         
                                                                             
AWE Contract   Company Website Serco Group plc 21.07.05     21.07.05         
Extension      : www.serco.com announces       London Stock                  
                               contract        Exchange                      
                               extension at UK                               
                               AWE                                           
                                                                             
Filing of      Company Website Serco Group plc 01.08.05     01.08.05         
ITNET plc 2004 : www.serco.com ("Serco") has   London Stock                  
Accounts                       filed the 2004  Exchange                      
                               accounts for                                  
                               ITNET plc                                     
                               ("ITNET").                                    
                                                                             
Dstl Strategic Company Website Serco Group plc 11.08.05     11.08.05         
Partnership    : www.serco.com selected as     London Stock                  
                               preferred       Exchange                      
                               bidder for a £                                
                               400m Dstl                                     
                               strategic                                     
                               partnership                                   
                                                                             
Serco joint    Company Website Serco Group plc 25.08.05     25.08.05         
venture wins   : www.serco.com today announces London Stock                  
Australian                     that its joint  Exchange                      
defence                        venture with                                  
contract                       Sodexho                                       
                               Alliance has                                  
                               renewed and                                   
                               expanded                                      
                                                                             
Interim        Company Website Interim Results 31.08.05     31.08.05         
Results - Part : www.serco.com - Part 1        London Stock                  
1                                              Exchange                      
                                                                             
Business       Company Website The Business    31.08.05     31.08.05         
Review         : www.serco.com Review sets out London Stock                  
                               Serco's         Exchange                      
                               contract wins                                 
                               and operational                               
                               performance                                   
                               during the                                    
                               first half of                                 
                               2005                                          
                                                                             
Interim        Company Website Interim Results 31.08.05     31.08.05         
Results - Part : www.serco.com - Part 2        London Stock                  
2                                              Exchange                      
                                                                             
International  Company Website This            31.08.05     31.08.05         
Financial      : www.serco.com announcement    London Stock                  
Reporting                      provides        Exchange                      
Standards -                    further details                               
Part 1                         of Serco's                                    
                               transition to                                 
                               IFRS                                          
                                                                             
International  Company Website International   31.08.05     31.08.05         
Financial      : www.serco.com Financial       London Stock                  
Reporting                      Reporting       Exchange                      
Standards -                    Standards -                                   
Part 2                         Part 2                                        
                                                                             
International  Company Website International   31.08.05     31.08.05         
Financial      : www.serco.com Financial       London Stock                  
Reporting                      Reporting       Exchange                      
Standards -                    Standards -                                   
Part 3                         Part 3                                        
                                                                             
International  Company Website International   31.08.05     31.08.05         
Financial      : www.serco.com Financial       London Stock                  
Reporting                      Reporting       Exchange                      
Standards -                    Standards -                                   
Part 4                         Part 4                                        
                                                                             
Director/PDMR  Company Website Increase in     26.09.05     26.09.05         
Shareholding   : www.serco.com Directors'      London Stock                  
                               shareholding    Exchange                      
                               for Margaret                                  
                               Ford                                          
                                                                             
Acquisition of Company Website Serco Group plc 03.10.05     03.10.05         
shares in      : www.serco.com ("Serco") today London Stock                  
Joint Venture                  announces that  Exchange                      
                               it has                                        
                               purchased                                     
                               Equion                                        
                               Limited's 50%                                 
                               share of                                      
                               Defence                                       
                               Management                                    
                               Holdings                                      
                               Limited                                       
                                                                             
Contract Award Company Website Serco wins UK   12.10.05     12.10.05         
               : www.serco.com homeland        London Stock                  
                               security        Exchange                      
                               contract                                      
                                                                             
Holding(s) in  Company Website Aviva plc and   17.10.05     17.10.05         
Company        : www.serco.com its             London Stock                  
                               subsidiaries    Exchange                      
                               3.1711%                                       
                                                                             
Holding(s) in  Company Website Aviva plc and   21.10.05     21.10.05         
Company        : www.serco.com its             London Stock                  
                               subsidiaries    Exchange                      
                               4.0956%                                       
                                                                             
Holding(s) in  Company Website Scottish Widows 21.10.05     21.10.05         
Company        : www.serco.com Investment      London Stock                  
                               Partnership, no Exchange                      
                               longer have a                                 
                               notifiable                                    
                               interest in the                               
                               Company.                                      
                                                                             
Scottish       Company Website Serco signs £   21.10.05     21.10.05         
Executive -    : www.serco.com 30m contract to London Stock                  
Electronic                     monitor         Exchange                      
Monitoring                     offenders in                                  
                               Scotland                                      
                                                                             
Director/PDMR  Company Website Increase in     21.10.05     21.10.05         
Shareholding   : www.serco.com Directors'      London Stock                  
                               shareholding    Exchange                      
                               for Christopher                               
                               Hyman                                         
                                                                             
Holding(s) in  Company Website Aviva plc and   31.10.05     31.10.05         
Company        : www.serco.com its             London Stock                  
                               subsidiaries    Exchange                      
                               5.11%                                         
                                                                             
Presentation   Company Website Serco Group plc 02.11.05     02.11.05         
of Investors   : www.serco.com will today      London Stock                  
                               present to      Exchange                      
                               investors at an                               
                               event hosted by                               
                               Merrill Lynch.                                
                                                                             
Serco wins     Company Website Serco Group plc 07.11.05     07.11.05         
contract to    : www.serco.com today announces London Stock                  
help small                     that it has     Exchange                      
businesses                     been selected                                 
                               as prime                                      
                               contractor to                                 
                               provide the UK                                
                               government with                               
                               web-based                                     
                               information                                   
                               services                                      
                                                                             
Serco          Company Website Serco Group plc 22.11.05     22.11.05         
appointed      : www.serco.com appointed       London Stock                  
preferred                      preferred       Exchange                      
bidder DLR                     bidder for £                                  
                               400m Docklands                                
                               Light Railway                                 
                               service                                       
                                                                             
Pre-Close      Company Website Pre-Close       02.12.05     02.12.05         
Trading Update : www.serco.com Trading Update  London Stock                  
                                               Exchange                      
                                                                             
Holding(s) in  Company Website FMR Corp. and   05.01.06     05.01.06         
Company        : www.serco.com its direct and  London Stock                  
                               indirect        Exchange                      
                               subsidiaries,                                 
                               and Fidelity                                  
                               International                                 
                               Limited and its                               
                               direct and                                    
                               indirect                                      
                               subsidiaries.                                 
                               6.38%                                         
                                                                             
Holding(s) in  Company Website FMR Corp. and   06.02.06     06.02.06         
Company        : www.serco.com its direct and  London Stock                  
                               indirect        Exchange                      
                               subsidiaries,                                 
                               and Fidelity                                  
                               International                                 
                               Limited and its                               
                               direct and                                    
                               indirect                                      
                               subsidiaries.                                 
                               7.0810%                                       
                                                                             
Serco          Company Website Serco selected  06.02.06     06.02.06         
preferred      : www.serco.com as preferred    London Stock                  
bidder - MoD                   bidder for £1bn Exchange                      
marine                         MoD marine                                    
services                       services                                      
contract                       contract                                      
                                                                             
Holding(s) in  Company Website HBOS plc -      17.02.06     17.02.06         
Company        : www.serco.com 10.336%         London Stock                  
                                               Exchange                      
                                                                             
Final Results  Company Website 2005            01.03.06     01.03.06         
- Part 1       : www.serco.com Preliminary     London Stock                  
                               Results         Exchange                      
                                                                             
Final Results - Company        2005            01.03.06     01.03.06         
Part 2          Website :      Preliminary     London Stock                  
                www.serco.com  Results         Exchange                      
                                                                             
Holding(s) in   Company        The AEGON UK    01.03.06     01.03.06         
Company         Website :      Plc Group of    London Stock                  
                www.serco.com  Companies.      Exchange                      
                               3.1040%                                       
                                                                             
Serco signs new Company        Serco signs new 08.03.06     08.03.06         
GBP400m DLR     Website :      £400m Docklands London Stock                  
Franchise       www.serco.com  Light Railway   Exchange                      
                               franchise                                     
                                                                             
Holding(s) in   Company        Lloyds TSB      10.03.06     10.03.06         
Company         Website :      Group Plc and   London Stock                  
                www.serco.com  its             Exchange                      
                               subsidiaries -                                
                               3.0676%                                       
                                                                             
Director/PDMR   Company        Decrease in     14.03.06     14.03.06         
Shareholding    Website :      Directors'      London Stock                  
                www.serco.com  shareholding    Exchange                      
                               for Kevin                                     
                               Beeston                                       
                                                                             
Director/PDMR   Company        Increase in     15.03.06     15.03.03         
Shareholding    Website :      PDMRs'          London Stock                  
                www.serco.com  shareholding    Exchange                      
                               for Steve                                     
                               Cuthill                                       
                                                                             
Director/PDMR   Company        In accordance   22.03.06     22.03.06         
Shareholding    Website :      with Deferred   London Stock                  
                www.serco.com  Bonus Schemes   Exchange                      
                               the following                                 
                               Directors of                                  
                               Serco Group plc                               
                               have acquired                                 
                               ordinary shares                               
                               of 2p each:                                   
                               Christopher                                   
                               Hyman and                                     
                               Andrew Jenner                                 
                                                                             
Directorate     Company        Serco Group plc 30.03.06     30.03.06         
Change          Website :      today announces London Stock                  
                www.serco.com  the appointment Exchange                      
                               of Leonard                                    
                               Broese van                                    
                               Groenou as a                                  
                               non-Executive                                 
                               Director of the                               
                               company                                       
                                                                             
Director/PDMR   Company        Andrew Jenner   04.04.06     04.04.06         
Shareholding    Website :      has exercised   London Stock                  
                www.serco.com  options over    Exchange                      
                               Ordinary shares                               
                               of 2p each in                                 
                               the Company                                   
                               under the Serco                               
                               Group plc                                     
                               Executive Share                               
                               Option Scheme                                 
                               and transferred                               
                               all the shares                                
                               to his spouse                                 
                                                                             
Holding(s) in   Company        Britannic       05.04.06     05.04.06         
Company         Website :      Investment      London Stock                  
                www.serco.com  Managers        Exchange                      
                               Limited.                                      
                               3.0208%                                       
                                                                             
Holding(s) in   Company        FMR Corp. and   07.04.06     07.04.06         
Company         Website :      its direct and  London Stock                  
                www.serco.com  indirect        Exchange                      
                               subsidiaries                                  
                               and Fidelity                                  
                               International                                 
                               Limited and its                               
                               direct and                                    
                               indirect                                      
                               subsidiaries.                                 
                               6.6963%