Total Voting Rights

PENNON GROUP PLC

FOR IMMEDIATE RELEASE

TOTAL VOTING RIGHTS AND CAPITAL

In conformity with Disclosure and Transparency Rule 5.6.1(1), Pennon Group plc hereby notifies the market that at 29 September 2017, the issued share capital of the Company was 419,620,747 ordinary shares of nominal value 40.7p each with voting rights, although 8,443 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 419,620,747 the figure 419,612,304 (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 29 September 2017, 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 8,443.

2 October 2017

www.pennon-group.co.uk