Additional Listing

PENNON GROUP PLC

FOR IMMEDIATE RELEASE

SCRIP DIVIDEND ALTERNATIVE - ADDITIONAL LISTING

Application has been made to the UK Listing Authority for the admission of 920,966 Ordinary shares of 40.7 pence each in the Company to the Official List and to the London Stock Exchange for these securities to be admitted to trading. The application has been made pursuant to the Scrip Dividend Alternative in lieu of cash for the final dividend for the year ended 31 March 2012. Admission is effective from 5 October 2012.

28 September 2012

www.pennon-group.co.uk