Total Voting Rights

RNS Number : 1293T

Pennon Group PLC

01 June 2009

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 31 May 2009, the issued share capital of the Company was 355,164,274 ordinary shares of nominal value 40.7p each with voting rights, although 5,718,669 of these shares had no exercisable voting rights as they were held in treasury. Therefore, whilst currently the total number of voting rights in Pennon Group Plc is 355,164,274, the figure 349,445,605 (the Company's issued share capital less the shares held in treasury) is the figure that 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 conformity with Disclosure and Transparency Rule 5.6.1(2), Pennon Group Plc hereby notifies the market that at 31 May 2009, as detailed in the paragraph above, the total number of voting rights attaching to shares of the Company which are held by it in treasury is 5,718,669.