Total Voting Rights

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 2016, the issued share capital of the Company was 412,630,634 ordinary shares of nominal value 40.7p each with voting rights, although 10,356 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 412,630,634 the figure 412,620,278 (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 FCA'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 2016, 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 10,356.

31 May 2016

www.pennon-group.co.uk