Transaction in Own Shares

Pennon Group PLC
13 November 2007

Pennon Group Plc announces that it has today purchased through Credit Suisse
(Securities) Europe Limited 50,000 ordinary shares at a price of 589.55 pence
per share.



The purchased shares will all be held in treasury.  Following the above purchase
and non-cancellation of such equity shares, Pennon Group Plc will hold 6,293,785
ordinary shares in treasury and a total of 348,870,489 ordinary shares will be
in issue (excluding shares to be held in treasury).


                      This information is provided by RNS
            The company news service from the London Stock Exchange