Total Voting Rights

RNS Number : 6111V

Pennon Group PLC

30 May 2008

PENNON GROUP PLC

FOR IMMEDIATE RELEASE

VOTING RIGHTS AND CAPITAL

In conformity with Disclosure and Transparency Rule 5.6.1(1), Pennon Group Plc hereby notifies the market that at 30 May 2008, the issued share capital of the Company was 348,761,233 ordinary shares of nominal value 40.7p each with voting rights. Therefore, currently the total number of voting rights in Pennon Group Plc is 348,761,233. This figure may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, Pennon Group Plc under the FSA's Disclosure and Transparency Rules.

In addition, in conformity with Disclosure and Transparency Rule 5.6.1(2) Pennon Group Plc hereby notifies the market that at 30 May 2008, the total number of voting rights attaching to shares of the Company which are held by it in treasury is 6,403,041.