Holding(s) in Company

For filings with the FSA include the annex                                              
                                                                                        
For filings with issuer exclude the annex                                               
                                                                                        
                                                                                        
                                                                                        
TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi                                         
                                                                                        
                                                                                        
                                                                                        
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 specify):                                                                 
                                                                                        
3. Full name of person(s) subject to the                           BlackRock, Inc.      
notification obligation:iii                                                             
                                                                                        
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                                   19th May 2010       
reached: v                                                                              
                                                                                        
6. Date on which issuer notified:                                   21st May 2010       
                                                                                        
7. Threshold(s) that is/are crossed or                        Holding has gone below 13%
reached: vi, vii                                                                        
                                                                                        
8. Notified details:                                                                          
                                                                                              

A: Voting rights attached to shares viii, ix                                                  
                                                                                              
Class/type   Situation previous          Resulting situation after the triggering transaction 
of           to the triggering                                                                
shares       transaction                                                                      
                                                                                              
             Number          Number      Number    Number of voting     % of  voting rights x 
if possible  of              of          of shares rights                                     
using        Shares          Voting                                                           
the ISIN                     Rights      Direct    Direct xi  Indirect  Direct   Indirect     
CODE                                                          xii                             
                                                                                              
GB0004866223 6,597,788       6,597,788   N/A       N/A        6,540,266 N/A      10.171%      
                                                                                              
                                                                                              
                                                                                              
B: Qualifying Financial Instruments                                                           
                                                                                              
Resulting situation after the triggering transaction                                          
                                                                                              
Type of        Expiration        Exercise/          Number of voting            % of voting   
financial      date xiii         Conversion Period  rights that may be          rights        
instrument                       xiv                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       Exercise price Expiration Exercise/  Number of voting rights  % of voting rights
financial                    date xvii  Conversion instrument refers to     xix, xx           
instrument                              period                                                
                                        xviii                                                 
                                                                                              
                                                                            Nominal Delta       
CFD                                                1,817,401                                  
                                                                            2.826% 2.826%      
                                                                                              
                                                                                              
                                                                                              
Total (A+B+C)                                                                                 
                                                                                              
Number of voting rights                          Percentage of voting rights                  
                                                                                              
8,357,667                                        12.997%                                      

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 - 8,357,667 (12.997%)                      
                                                                                        

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:                                                                          
                                                                                        
                                           BlackRock Threshold Reporting Team          
13. Additional information:                                                             
                                                                                        
14. Contact name:                           Stuart Watchorn                             
                                                                                        
15. Contact telephone number:               020 7743 5741; [e-mail]
                                                                                        


 

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                                                                         
                                                           33 King William Street,      
(registered office for legal entities)                     London, EC4R 9AS             
                                                                                        
                                                                                        
                                                                                        
Phone number & email                                       020 7743 5741;               
                                                           [e-mail]
                                                                                        
                                                                                        
Other useful information                                                                
                                                                                        
(at least legal representative for legal persons)          Stuart Watchorn              
                                                                                        
                                                                                        
                                                                                       
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                                                               
                                                                                        
                                                                                        
                                                                                        
For notes on how to complete form TR-1 please see the FSA website.