Purchase of Own Securities

THAMES WATER PLC
4 October 1999


Thames Water has announced today that it will be offering holders of Thames
Water B Shares another opportunity to sell their shares free from all dealing
commissions and stamp duties. The repurchase offer will take place on 9
December 1999. Repurchases will be made at the lower of (a) 79p and (b)105 per
cent of the average middle market quotations for the B Shares as derived from
the London Stock Exchange Daily Official List, for the five business days
preceding the purchase (exclusive of expenses), being the maximum price at
which the Company is permitted to make repurchases.

Shareholders who wish to take up the offer are requested to fill in the
repurchase offer form on the reverse of their B Share certificate, or (in the
case of shares held within CREST) effect the appropriate CREST repurchase
instruction, and return it to the Company's registrars, Computershare Services
PLC, at P O Box 452, 8 Bankhead Crossway North, Edinburgh EH11 4TQ. Completed
repurchase forms (or the appropriate CREST repurchase instruction)should be
sent so as to be received no later than 3.00pm on 6 December 1999 for
repurchases on 9 December 1999.CREST accounts will be credited and/or cheques
in respect of sale proceeds will be remitted to shareholders within 14 days of
the repurchase date.


Enquiries to:
Thames Water Plc                 0845 7414140
Computershare Services PLC       0870 702 0150