Annual Information Update

Annual Information Update ("AIU") for the 12 months up to 16 June 2010

1. Introduction

Severn Trent Plc (the "Company") published its annual financial statements for
the year ended 31 March 2010 on 16 June 2010. This AIU is made in accordance
with the requirements of Prospectus Rule 5.2 and not for any other purpose. The
information referred to below is not necessarily up-to-date as at the date of
this AIU and the Company does not undertake any obligation to update any such
information in the future.

This AIU contains a list of:

  * Announcements made via a Regulatory Information Service ("RIS");
   
  * Documents filed with the UK Registrar of Companies;
   
  * Documents filed with the Financial Services Authority; and
   
  * Documents published and sent to shareholders.
   
The Annual Information Update covers the period from 27 June 2009 up to and
including 09 July 2010.

The Company is publishing the AIU via an RIS today and making it available on
its website at www.severntrent.com

2. Regulatory Announcements

The following regulatory announcements have been made by the Company via an RIS
during the previous 12 months. Copies of these announcements can be viewed at
the London Stock Exchange's website at www.londonstockexchange.com and on the
Company's website at www.severntrent.com

Date of Publication  Regulatory Headline                                       
                                                                               
     01/07/2010      Total Voting Rights                                       
                                                                               
     29/06/2010      Director/PDMR Shareholding                                
                                                                               
     23/06/2010      Director/PDMR Shareholding                                
                                                                               
     16/06/2010      Notice of AGM                                             
                                                                               
     15/06/2010      Director/PDMR Shareholding                                
                                                                               
     02/06/2010      Total Voting Rights                                       
                                                                               
     28/05/2010      Final results                                             
                                                                               
     10/05/2010      Directorate Change                                        
                                                                               
     04/05/2010      Block Listing - Interim Review                            
                                                                               
     04/05/2010      Total Voting Rights                                       
                                                                               
     04/05/2010      Director/PDMR Shareholding                                
                                                                               
     28/04/2010      Additional Listing                                        
                                                                               
     01/04/2010      Total Voting Rights                                       
                                                                               
     01/03/2010      Total Voting Rights                                       
                                                                               
     04/02/2010      Total Voting Rights                                       
                                                                               
     27/01/2010      Director/PDMR Shareholding                                
                                                                               
     26/01/2010      Interim Management Statement                              
                                                                               
     25/01/2010      Directorate Change                                        
                                                                               
     19/01/2010      Ofwat's Final Determination for the period                
                                                                               
     05/01/2010      Director/PDMR Shareholding                                
                                                                               
     04/01/2010      Total Voting Rights                                       
                                                                               
     02/12/2009      Holding(s) in Company                                     
                                                                               
     01/12/2009      Total Voting Rights                                       
                                                                               
     26/11/2009      Ofwat Publishes Final Determination                       
                                                                               
     24/11/2009      Half-Yearly Report                                        
                                                                               
     06/11/2009      Block Listing - Interim Review                            
                                                                               
     02/11/2009      Total Voting Rights                                       
                                                                               
     01/10/2009      Total Voting Rights                                       
                                                                               
     28/09/2009      Director Declaration                                      
                                                                               
     01/09/2009      Total Voting Rights                                       
                                                                               
     10/08/2009      Holding(s) in Company                                     
                                                                               
     10/08/2009      Director/PDMR Shareholding                                
                                                                               
     05/08/2009      Director/PDMR Shareholding                                
                                                                               
     03/08/2009      Total Voting Rights                                       
                                                                               
     23/07/2009      Ofwat Publishes Draft Determination                       
                                                                               
     22/07/2009      Publication of Prospectus                                 
                                                                               
     22/07/2009      AGM Statement                                             
                                                                               
     21/07/2009      Interim Management Statement                              
                                                                               
     08/07/2009      Director/PDMR Shareholding                                
                                                                               
     02/07/2009      Director/PDMR Shareholding                                
                                                                               
     01/07/2009      Total Voting Rights                                       
                                                                               
     26/06/2009      Annual Information Update                                 

3. Documents filed with the Registrar of Companies

The following documents have been filed by the Company with the Registrar of
Companies at Companies House during the previous 12 months. Copies of these
documents may be obtained from:

Companies House
Crown Way
Maindy
Cardiff
CF14 3UZ
Tel: [phone]
Email:[e-mail]

Or, if you are a registered user, through Companies House Direct at 
www.direct.companieshouse.gov.uk

Date           Type           Description                              
                                                                       
07/07/2010     SH01           Return of allotment of shares            
                                                                       
01/07/2010     SH01           Return of allotment of shares            
                                                                       
01/07/2010     SH01           Return of allotment of shares            
                                                                       
25/06/2010     SH01           Return of allotment of shares            
                                                                       
14/06/2010     AP01           Appointment of director                  
                                                                       
02/06/2010     SH01           Return of allotment of shares            
                                                                       
02/06/2010     SH01           Return of allotment of shares            
                                                                       
29/04/2010     AR01           Annual Return                            
                                                                       
28/04/2010     SH01           Return of allotment of shares            
                                                                       
25/03/2010     SH01           Return of allotment of shares            
                                                                       
23/02/2010     SH01           Return of allotment of shares            
                                                                       
26/01/2010     SH01           Return of allotment of shares            
                                                                       
26/01/2010     SH01           Return of allotment of shares            
                                                                       
22/01/2010     SH01           Return of allotment of shares            
                                                                       
15/12/2009     CH03           Change of secretary's particulars        
                                                                       
15/12/2009     CH01           Change of director's particulars         
                                                                       
15/12/2009     CH03           Change of secretary's particulars        
                                                                       
15/12/2009     CH01           Change of director's particulars         
                                                                       
15/12/2009     CH01           Change of director's particulars         
                                                                       
15/12/2009     CH01           Change of director's particulars         
                                                                       
15/12/2009     CH01           Change of director's particulars         
                                                                       
15/12/2009     CH01           Change of director's particulars         
                                                                       
15/12/2009     CH01           Change of director's particulars         
                                                                       
15/12/2009     CH01           Change of director's particulars         
                                                                       
15/12/2009     CH01           Change of director's particulars         
                                                                       
15/12/2009     CH01           Change of director's particulars         
                                                                       
12/12/2009     SH01           Return of allotment of shares            
                                                                       
13/11/2009     SH01           Return of allotment of shares            
                                                                       
13/11/2009     SH01           Return of allotment of shares            
                                                                       
30/10/2009     SH01           Return of allotment of shares            
                                                                       
20/10/2009     AD03           Register(s) moved to SAIL address        
                                                                       
20/10/2009     AD02           SAIL address created                     
                                                                       
19/10/2009     CH03           Change of secretary's particulars        
                                                                       
11/09/2009     AA             Group accounts for y/e 31/03/09          
                                                                       
05/09/2009     Res13          Resolution                               
                                                                       
27/08/2009     88(2)          Return of allotment of shares            
                                                                       
27/08/2009     88(2)          Return of allotment of shares            
                                                                       
14/08/2009     88(2)          Return of allotment of shares            
                                                                       
06/08/2009     122            Amending Notice of Share Consolidation   
                                                                       
24/07/2009     88(2)          Return of allotment of shares            
                                                                       
24/07/2009     88(2)          Return of allotment of shares            
                                                                       
24/07/2009     88(2)          Return of allotment of shares            
                                                                       
16/07/2009     288a           Appointment of director                  

4. Documents filed with the Financial Services Authority and sent to
shareholders

The following documents have been filed by the Company with the Financial
Services Authority and sent to shareholders during the previous 12 months.
These documents may be viewed at the UK Listing Authority's Document Viewing
Facility at 25 The North Colonnade, Canary Wharf, London E14 5HS. Copies of
these documents are also available on request from the Company's registered
office at 2297 Coventry Road, Birmingham, B26 3PU.

Date                  Document                                               
                                                                             
16/06/2010            Severn Trent Plc Annual Report and Accounts 2010       
                                                                             
16/06/2010            Shareholder Summary 2010                               
                                                                             
16/06/2010            Notice of Annual General Meeting 2010                  
                                                                             
16/06/2010            Form of Proxy (2010 AGM), containing the Dividend      
                      Reinvestment Plan ("DRIP") application form            
                                                                             
16/06/2010            DRIP terms and conditions booklet                      
                                                                             
22/07/2009            Prospectus relating to a €4,000,000,000 Euro Medium    
                      Term Note                                              

5. Contacts

For further information, please contact:

Kerry Porritt
Deputy Secretary
0121 722 4730