Further re demerger and share consolidation

Severn Trent Plc                                

  Demerger of Biffa Plc and the Share Consolidation of Severn Trent Ordinary   
                               Shares effective                                

Further to the admission earlier today of the Biffa Ordinary Shares and the New
Severn Trent Ordinary Shares to listing on the Official List and to trading on
the London Stock Exchange's main market for listed securities, Severn Trent Plc
is pleased to announce that the Demerger of Biffa Plc and the Share
Consolidation of Severn Trent Ordinary Shares of 65 5/19 pence each into New
Severn Trent Ordinary Shares of 97 17/19 pence each have become effective.

CREST accounts were credited with Biffa Ordinary Shares and New Severn Trent
Ordinary Shares at 8.00am (BST) today.

Shareholders will be sent share certificates in respect of their holdings of
Biffa Ordinary Shares and New Severn Trent Ordinary Shares on 20 October 2006

Definitions used in the Circular to Severn Trent Shareholders dated 13
September 2006 shall have the same meanings when used in this announcement.

Severn Trent announcements are available on www.severntrent.com.

Enquiries:

Peter Gavan
Director of Corporate Affairs 07901 517447

Jonathan Davies
Head of Investor Relations 0121 722 4295

David Trenchard
Tulchan Communications Group 020 7353 4200

This announcement does not constitute an offer of, or the solicitation of an
offer to buy or subscribe for, or to sell, exchange or transfer any securities
in any jurisdiction. Securities may not be offered, sold or transferred in the
United States absent registration or an applicable exemption from the
registration requirements of the US Securities Act of 1933, as amended (the
"Securities Act").