Severn Trent Regulatory News (SVT)

12 March 2012

TRADING COMMENCES FOR SPONSORED AMERICAN DEPOSITARY RECEIPT ("ADR") PROGRAMME

Severn Trent Plc ("Severn Trent") is pleased to announce that, following the establishment of a Sponsored Level I ADR programme on 5 March 2012, trading of the ADRs is now underway in the United States.

ADRs are negotiable certificates, issued in registered form, and represent an interest in the shares of a non-U.S. company. ADRs are traded and settled in U.S. dollars. Severn Trent believes that the establishment of the ADR programme will benefit existing shareholders by making its shares more accessible to U.S. investors and provide Severn Trent with increased visibility within the U.S. market.

Ordinary shares in Severn Trent, in the form of ADRs, will trade on the Over-the-Counter (OTC) market in the United States on the basis of 1 ADR to 1 Severn Trent ordinary share.

Severn Trent has appointed The Bank of New York Mellon to act as the Depositary to establish and maintain the ADR facility.

Particulars for the ADR programme are as follows:

CUSIP:                                    81814P209

ISIN:                                         US81814P2092

ADR Ticker Symbol:               STRNY

ADR Ratio:                              1 ADR = 1 Ordinary Share

For more information, please contact:

Severn Trent

John Crosse, Head of Investor Relations

+44 2477 715000

john.crosse@severntrent.co.uk

Bank of New York Mellon

Joseph F. Ailinger Jr.                          Dori Flanagan

+1 617-722-7571                                +1 212-815-2291

joe.ailinger@bnymellon.com               dori.flanagan@bnymellon.com

About Severn Trent

Severn Trent Plc is a FTSE 100 company, engaged in the provision and treatment of water and the removal of waste water in the United Kingdom and internationally, through two complementary businesses: Severn Trent Water and Severn Trent Services. Severn Trent Water provides high quality water and sewerage services to over 3.7 million households and businesses in the Midlands and mid Wales. Severn Trent Services is one of the world's leading suppliers of water and waste water treatment solutions. Headquartered in the US, it has a growing presence in Europe, North America, the Middle East and Asia.