Holding(s) in Company

Pennon Group PLC
22 January 2007


PENNON GROUP PLC


FOR IMMEDIATE RELEASE


HOLDING IN COMPANY


Pennon Group Plc has received notification (by fax dated 19 January 2007) that
Lansdowne Partners Limited Partnership, on behalf of client funds that it
manages, holds an interest in 17,322,426 Ordinary shares of 40.7p each in the
Company.


22 January 2007

www.pennon-group.co.uk

End transmission


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