Holding(s) in Company

Pennon Group PLC
10 September 2004


PENNON GROUP PLC

FOR IMMEDIATE RELEASE

HOLDING IN COMPANY


Pennon Group Plc has today received notification (by fax dated 9 September 2004)
that Lansdowne Partners Limited Partnership, on behalf of client funds that it
manages, holds an interest of 5,237,050 Ordinary shares of £1.11p each in Pennon
Group Plc.


10 September 2004


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