Transaction in Own Shares

Pennon Group PLC
12 June 2007

Pennon Group Plc

12 June 2007

Transaction in Own Shares

Pennon Group Plc announces that it has today purchased through Merrill Lynch
International 50,000 ordinary shares at a price of 627.82 pence per share.

The purchased shares will all be held in treasury.  Following the above
purchase, Pennon Group Plc will hold 250,000 ordinary shares in treasury.

The total number of ordinary shares in issue (excluding shares to be held in
treasury) is 355,874,274.



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