Annual Information Update

Pennon Group PLC
21 July 2005

PENNON GROUP PLC ('THE COMPANY')



ANNUAL INFORMATION UPDATE FOR 12 MONTHS UP TO AND INCLUDING

21 JULY 2005



In accordance with Prospectus Rule 5.2, the following information has been
published or made available to the public over the previous 12 months


Date of Announcement                     Regulatory Headline


04/08/04                                 Scrip Dividend Alternative Circular
05/08/04                                 Ofwat announces draft price limits for water companies
24/08/04                                 Holding(s) in Company
27/08/04                                 Holding(s) in Company
10/09/04                                 Holding(s) in Company
17/09/04                                 Holding(s) in Company
20/09/04                                 Additional Listing
22/09/04                                 Holding(s) in Company
23/09/04                                 Trading Statement
24/09/04                                 Director Shareholding
01/10/04                                 Director Shareholding
04/10/04                                 Director Shareholding
05/10/04                                 Director Shareholding
06/10/04                                 Holding(s) in Company
07/10/04                                 Director Shareholding
07/10/04                                 Director Shareholding
11/10/04                                 Holding(s) in Company
12/10/04                                 Holding(s) in Company
14/10/04                                 Holding(s) in Company
20/10/04                                 Holding(s) in Company
19/11/04                                 Holding(s) in Company
22/11/04                                 Holding(s) in Company
24/11/04                                 Holding(s) in Company
26/11/04                                 Holding(s) in Company
02/12/04                                 Ofwat Water Companies Price Limits
09/12/04                                 Interim Results
17/12/04                                 Director Shareholding
29/12/04                                 Holding(s) in Company
31/12/04                                 Holding(s) in Company
14/01/05                                 2004 Interim Report
17/01/05                                 Holding(s) in Company
20/01/05                                 Holding(s) in Company
02/02/05                                 Holding(s) in Company
09/02/05                                 Holding(s) in Company
11/02/05                                 Holding(s) in Company
11/02/05                                 Holding(s) in Company
16/02/05                                 Holding(s) in Company
25/02/05                                 Scrip Dividend Alternative Circular
28/02/05                                 Director Shareholding
17/03/05                                 Holding(s) in Company
18/03/05                                 Holding(s) in Company
24/03/05                                 Blocklisting Interim Review
24/03/05                                 Holding(s) in Company
30/03/05                                 Trading Statement
05/04/05                                 Holding(s) in Company
05/04/05                                 Holding(s) in Company
05/04/05                                 Director Shareholding
07/04/05                                 Additional Listing
07/04/05                                 Director Shareholding
12/04/05                                 Director Shareholding
13/04/05                                 Director Shareholding
13/04/05                                 Director Shareholding
22/04/05                                 Holding(s) in Company
26/05/05                                 Final Results
22/06/05                                 Acquisition
29/06/05                                 Annual Report & Accounts
12/07/05                                 Director/PDMR Shareholding
12/07/05                                 Director/PDMR Shareholding
12/07/05                                 Director/PDMR Shareholding
12/07/05                                 Director/PDMR Shareholding
12/07/05                                 Director/PDMR Shareholding
12/07/05                                 Director/PDMR Shareholding



In accordance with the provisions of Article 27(3) of the Prospectus Directive
Regulation, it is confirmed that some of the information disclosed in the above
announcements may be out of date.



Details of all regulatory headlines can be downloaded from the Companies prices
page (entering code PIN) of the London Stock Exchange website at
www.londonstock-exchange.com, except for the announcement dated 24/08/04 which
can be downloaded from the Press Notices section of the OFWAT website at
www.ofwat.gov.uk and any related documents are available at the UKLA's Document
Viewing Facility, Financial Services Authority, 25 The North Colonnade, Canary
Wharf, London E14 5HS.







21 July 2005





www.pennon-group.co.uk





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