Major Interests in Shares

TR-1: Notifications of Major Interests in Shares                               

1. Identity of the issuer or the underlying             Serco Group plc        
issuer of existing shares to which voting                                      
rights are attached:                                                           
                                                                               
2. Reason for notification (yes/no)                                            
                                                                               
An acquisition or disposal of voting rights                   Yes    
                                                                               
An acquisition or disposal of financial instruments which may result           
in the acquisition of shares already issued to which voting rights             
are attached                                                                   
                                                                               
An event changing the breakdown of voting rights                               
                                                                               
Other (please specify):______________                                          
                                                                               
3. Full name of person(s) subject to           Lloyds Banking Group plc        
notification obligation:                                                       
                                                                               
4. Full name of shareholder(s) (if                   See Section 9             
different from 3):                                                             
                                                                               
5. Date of transaction (and date on                  30 March 2009             
which the threshold is crossed or                                              
reached if different):                                                         
                                                                               
6. Date on which issuer notified:                    31 March 2009             
                                                                               
7. Threshold(s) that is/are crossed or  Increase to above 5% (Direct/Indirect) 
reached:                                                                       

8: Notified Details                                                              
                                                                                 
A: Voting rights attached to shares                                              
                                                                                 
Class/type  Situation previous  Resulting situation after the triggering         
of shares   to the triggering   transaction                                      
            transaction                                                          
If possible                                                                      
use ISIN                                                                         
code                                                                             
                                                                                 

             Number of    Number   Number  Number of voting rights   Percentage of             
             shares       of       of                                voting rights             
                          voting   shares                                              
                          rights                                                         
                                   Direct    Direct    Indirect      Direct   Indirect       
                                                                            
Ordinary          n/a      n/a     4,677,490 4,677,490 20,433,862    0.96%    4.20% 
Share                                                                       
GB0007973794                                                                

B: Financial Instruments                                                       
                                                                               
Resulting situation after the triggering transaction                           
                                                                               
Type of        Expiration     Exercise/       No. of voting      Percentage of 
financial      date           conversion      rights that may be voting rights 
instrument                    period/date     acquired (if the                 
                                              instrument                       
                                              exercised/                       
                                              converted)                       
                                                                               
N/A                                                                            

Total (A+B)                                                                    
                                                                               
Number of voting rights                 Percentage of voting rights            
                                                                               
25,111,352                              5.16%                                  

9. Chain of controlled undertakings through which the voting rights and /or the 
financial instruments are effectively held, if applicable:                      
                                                                                
8,038,956 (1.65%) are held by State Street Nominees Ltd. Shares are under the   
control of Scottish Widows Investment Partnership Ltd, a wholly owned           
subsidiary of Scottish Widows Group Ltd, a wholly owned subsidiary of Lloyds    
TSB Bank plc, a wholly owned subsidiary of Lloyds Banking Group plc (Indirect   
Interests).                                                                     
                                                                                
9,765,519 shares (2.01%) are under the control of Insight Investment Management 
(Global) Limited, a wholly owned subsidiary of Insight Investment Management    
Limited, a wholly owned subsidiary of HBOS Insurance & Investment Group         
Limited, a wholly owned subisidiary of HBOS plc, a wholly owned subsidiary of   
Lloyds Banking Group plc (Indirect Interests).                                  

Proxy Voting:                                                                  
                                                                               
10. Name of proxy holder:               N/A                                    
                                                                               
11. Number of voting rights proxy       N/A                                    
holder will cease to hold:                                                     
                                                                               
12. Date on which proxy holder will     N/A                                    
cease to hold voting rights:                                                   

13. Additional information:             Serco Group plc is disclosing this     
                                        information in accordance with DTR     
                                        5.8.12.                                
                                                                               
14 Contact name:                        Sarah Howfield, Company Secretarial    
                                        Assistant                              
                                                                               
                                        Serco Group plc                        
                                                                               
15. Contact telephone number:           01256 744272