Additional Listing

PENNON GROUP PLC (THE" COMPANY")

FOR IMMEDIATE RELEASE

ADDITIONAL LISTING

Application has been made to the UK Listing Authority for the admission of 824,749 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 interim dividend for the year ended 31 March 2011. Admission is effective from 1 April 2011.

 30 March 2011

www.pennon-group.co.uk

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