Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES                                             
                                                                                            
                                                                                            
                                                                                            
1. Identity of the issuer or the underlying issuer                                          
of existing shares to which voting rights are                  Keller Group plc             
attached:ii                                                                                 
                                                                                            
2 Reason for the notification (please tick the appropriate box or boxes):                   
                                                                                            
An acquisition or disposal of voting rights                                                 
                                                                                            
An acquisition or disposal of qualifying financial instruments which may result             
in the acquisition of shares already issued to which voting rights are attached             
                                                                                            
An acquisition or disposal of instruments with similar economic effect to                   
qualifying financial instruments                                                            
                                                                                            
An event changing the breakdown of voting rights                                            
                                                                                            
Other (please   DTR (Disclosure of contracts for difference) 1st June 2009              
specify):                                                                                   
                                                                                            
3. Full name of person(s) subject to the                                                    
notification obligation:iii                                  BlackRock Inc.                 
                                                                                            
4. Full name of shareholder(s)                                                              
 (if different from 3.):iv                                                                  
                                                                                            
5. Date of the transaction and date on                                                      
which the threshold is crossed or                            1st June 2009                  
reached: v                                                                                  
                                                                                            
6. Date on which issuer notified:                            3rd June 2009                  
                                                                                            
7. Threshold(s) that is/are crossed or                       Gone above 5%                  
reached: vi, vii                                                                            
                                                                                          
8. Notified details:                                                                                  
                                                                                                      
A: Voting rights attached to shares viii, ix                                                          
                                                                                                      
Class/type of    Situation previous         Resulting situation after the triggering transaction      
shares           to the triggering                                                                    
                 transaction                                                                          
                                                                                                      
if possible      Number        Number       Number      Number of voting      % of  voting rights x   
using            of            of           of shares   rights                                        
the ISIN CODE    Shares        Voting                                                                 
                               Rights       Direct      Direct xi  Indirect   Direct       Indirect   
                                                                   xii                                
                                                                                                      
                                                                                                      
GB0004866223     N/A           N/A          N/A         N/A        2,557,723  N/A          3.99%      
                                                                                                      
                                                                                                      
                                                                                                      
B: Qualifying Financial Instruments                                                                   
                                                                                                      
Resulting situation after the triggering transaction                                                  
                                                                                                      
Type of financial       Expiration  Exercise/               Number of voting        % of voting       
instrument              date xiii   Conversion Period xiv   rights that may be      rights            
                                                            acquired if the                           
                                                            instrument is                             
                                                            exercised/ converted.                     
                                                                                                      
                                                                                                                                                                                                                            
                                                                                                
C: Financial Instruments with similar economic effect to Qualifying Financial                         
Instruments xv, xvi                                                                                   
                                                                                                      
Resulting situation after the triggering transaction                                                  
                                                                                                      
Type of financial  Exercise    Expiration Exercise/     Number of voting rights  % of voting rights   
instrument         price       date xvii  Conversion    instrument refers to     xix, xx              
                                          period xviii                                                
                                                                                                      
                                                                                                      
                                                                                 Nominal      Delta   
                                                                                                      
CFD                N/A         N/A        N/A           1,053,288                                     
                                                                                 1.64%                
                                                                                                      
                                                                                                      
                                                                                                      
                                                                                                      
Total (A+B+C)                                                                                         
                                                                                                      
Number of voting rights                            Percentage of voting rights                        
                                                                                                      
3,611,011                                          5.64%      
                                        
 
9. Chain of controlled undertakings through which the voting rights and/or the            
financial instruments are effectively held, if applicable: xxi                            
                                                                                         
BlackRock Investment Management (UK) Limited - 3,611,011 (5.64%)                          
                                                                                          
Proxy Voting:                                                                             
                                                                                          
10. Name of the proxy holder:                                                             
                                                                                          
11. Number of voting rights proxy holder will cease                                       
to hold:                                                                                  
                                                                                          
12. Date on which proxy holder will cease to hold                                         
voting rights:                                                                            
                                                                                     
13. Additional information:                                                               
                                                                                          
14. Contact name:                                                                         
                                                                                          
15. Contact telephone number:                                                             

Note: Annex should only be submitted to the FSA not the issuer                           
                                                                                         
Annex: Notification of major interests in sharesxxii                                     
                                                                                         
A: Identity of the persons or legal entity subject to the notification                   
obligation                                                                               
                                                                                         
Full name                                                                                
                                                                                         
(including legal form of legal entities)    BlackRock Inc                                
                                                                                         
Contact address                                                                          
                                                                                         
(registered office for legal entities)      33 King William Street, London EC4R 9AS      
                                                                                         
Phone number & email                                                                     
                                            0131 472 7472                                
                                                                                         
Other useful information                                                                 
                                                                                         
(at least legal representative for legal    Louise Lyle                                  
persons)                                                                                 
                                                                                         
                                                                                         
B: Identity of the notifier, if applicable                                               
                                                                                         
Full name                                                                                
                                                                                         
Contact address                                                                          
                                                                                         
Phone number & email                                                                     
                                                                                        
Other useful information                                                                 
                                                                                         
(e.g. functional relationship with the                                                   
person or legal entity subject to the                                                    
notification obligation)                                                                 
                                                                                         
C: Additional information