Holding(s) in Company

Form TR-1 with annex. FSA Version 2.1 updated April 2007

For filings with the FSA include the annex  
                                            
For filings with issuer exclude the annex   

TR-1: Notifications of Major Interests in Shares                               

1. Identity of the issuer or the underlying     Severn Trent 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    Invesco Limited                        
notification obligation:                                                       
                                                                               
4. Full name of shareholder(s) (if                                             
different from 3):                                                             
                                                                               
5. Date of transaction (and date on     24 February 2009                       
which the threshold is crossed or                                              
reached if different):                                                         
                                                                               
6. Date on which issuer notified:       27 February 2009                       
                                                                               
7. Threshold(s) that is/are crossed or  5%                                     
reached:                                                                       

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

Number of    Number of  Number of  Number of voting    Percentage of            
shares       voting     shares     rights              voting rights            
             rights                                                             
                                   Direct     Indirect Direct     Indirect      
                                                                                
Ordinary     11,792,215 11,792,215 11,980,630          11,980,630          5.07%
97.89p                                                                          
                                                                                
GB00B1FH8J72                                                                    

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)                       
                                                                               

Total (A+B)                                                                    
                                                                               
Number of voting rights                 Percentage of voting rights            
                                                                               
11,980,630                              5.07%                                  

9. Chain of controlled undertakings through which the voting rights and /or the
financial instruments are effectively held, if applicable:                     
                                                                               
Bank of New York - 10,669                                                      
                                                                               
Bank of New York (Brussels) - 7,940                                            
                                                                               
Chase Bank (Hong Kong) - 27,686                                                
                                                                               
JP Morgan Chase - 604,200                                                      
                                                                               
Citibank New York - 8,099                                                      
                                                                               
Citibank - 8,841,863                                                           
                                                                               
Deutsche Bank London - 8,775                                                   
                                                                               
HSBC - 201,141                                                                 
                                                                               
Morgan Stanley London - 22,329                                                 
                                                                               
State Street London - 1,718,783                                                
                                                                               
Trust & Custody Services JP - 856                                              
                                                                               
Northern Trust Company London - 120,410                                        
                                                                               
PowerShares Capital Management - 398,728                                       
                                                                               
Other - 9,152                                                                  

Proxy Voting:                                                                  
                                                                               
10. Name of 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:                        Kerry Porritt - Severn Trent plc       
                                                                               
15. Contact telephone name:             0121 722 4730