Annual Information Update

Pennon Group PLC
24 July 2006

PENNON GROUP PLC ('THE COMPANY')

ANNUAL INFORMATION UPDATE ('AIU') FOR 12 MONTHS UP TO AND INCLUDING 24 JULY 2006

This AIU is required by and is being made pursuant to Article 10 of the
Prospectus Directive as implemented in the United Kingdom in Prospectus Rule 5.2
and not for any other purpose and neither the Company, nor any other person,
takes any responsibility for, or makes any representation, express or implied,
as to the accuracy or completeness of, the information which it contains.  This
information is not necessarily up to date as at the date of the AIU and the
Company does not undertake any obligation to update any such information in the
future.

This AIU contains a list of:

Announcements made via a Regulatory Information Service ('RIS')
Documents filed with the UK Registrar of Companies ('Companies House')
Documents filed with the Financial Services Authority; and
Documents published and sent to shareholders.

1.     Regulatory Announcements

The following regulatory announcements have been made by the Company via an RIS 
during the previous 12 months.  Copies of these announcements can be viewed at 
the London Stock Exchange's website at
www.londonstockexchange.com/en-gb/pricesnews/marketnews (entering code 'PNN')

Date of Announcement              Regulatory Headline

21/07/05                          Annual Information Update
29/07/05                          Annual General Meeting
04/08/05                          Notification of Transaction
08/08/05                          Holding(s) in Company
09/08/05                          Director/PDMR Shareholding
11/08/05                          Director/PDMR Shareholding
11/08/05                          Director/PDMR Shareholding
11/08/05                          Director/PDMR Shareholding
12/08/05                          Holding(s) in Company
17/08/05                          Holding(s) in Company
17/08/05                          Holding(s) in Company
30/08/05                          Scrip Dividend Alt
02/09/05                          Re Joint Venture
05/09/05                          Director/PDMR Shareholding
05/09/05                          Holding(s) in Company
06/09/05                          Holding(s) in Company
09/09/05                          Holding(s) in Company
12/09/05                          Blocklisting
26/09/05                          Trading Statement
29/09/05                          Director/PDMR Shareholding
29/09/05                          Director/PDMR Shareholding
30/09/05                          Director/PDMR Shareholding
03/10/05                          Director/PDMR Shareholding
03/10/05                          Director/PDMR Shareholding
03/10/05                          Director/PDMR Shareholding
04/10/05                          Director/PDMR Shareholding
05/10/05                          Director/PDMR Shareholding
05/10/05                          Director/PDMR Shareholding
06/10/05                          Director/PDMR Shareholding
07/10/05                          Director/PDMR Shareholding
11/10/05                          Director/PDMR Shareholding
11/10/05                          Director/PDMR Shareholding
11/10/05                          Director/PDMR Shareholding
11/10/05                          Director/PDMR Shareholding
11/10/05                          Director/PDMR Shareholding
11/10/05                          Director/PDMR Shareholding
11/10/05                          Director/PDMR Shareholding
17/10/05                          Holding(s) in Company
19/10/05                          Director/PDMR Shareholding
19/10/05                          Director/PDMR Shareholding
19/10/05                          Additional Listing
24/10/05                          Blocklisting Interim Report
08/12/05                          Interim Results
08/12/05                          Adoption of IFRS
22/12/05                          Doc re. Explanatory memo
06/01/06                          Director/PDMR Shareholding
13/01/06                          Early repayment of Bonds
18/01/06                          Early repayment of Bonds
20/01/06                          Holding(s) in Company
23/01/06                          Proposed Return of Cash
23/01/06                          Interim Report 2005
24/01/06                          Proposed Return of Cash
27/01/06                          Director/PDMR Shareholding
08/02/06                          Director/PDMR Shareholding
13/02/06                          Directorate Change
15/02/06                          Result of EGM
20/02/06                          Further re return of cash
22/02/06                          Holding(s) in Company
22/02/06                          Holding(s) in Company
22/02/06                          Dividend Declaration
22/02/06                          Holding(s) in Company
27/02/06                          B Share Scheme Election
28/02/06                          Director/PDMR Shareholding
14/03/06                          Director/PDMR Shareholding
14/03/06                          Holding(s) in Company
20/03/06                          Holding(s) in Company
22/03/06                          Director/PDMR Shareholding
23/03/06                          Director/PDMR Shareholding
30/03/06                          Trading Statement
20/04/06                          Director/PDMR Shareholding
20/04/06                          Director/PDMR Shareholding
21/04/06                          Director/PDMR Shareholding
21/04/06                          Director/PDMR Shareholding
21/04/06                          Director/PDMR Shareholding
21/04/06                          Director/PDMR Shareholding
21/04/06                          Director/PDMR Shareholding
15/05/06                          Acquisition
17/05/06                          Directorate Change
01/06/06                          Final Results
05/06/06                          Holding(s) in Company
06/06/06                          Holding(s) in Company
07/06/06                          Director/PDMR Shareholding
07/06/06                          Holding(s) in Company
08/06/06                          Transaction in Own Shares
09/06/06                          Transaction in Own Shares
13/06/06                          Transaction in Own Shares
14/06/06                          Transaction in Own Shares
19/06/06                          Transaction in Own Shares
22/06/06                          Transaction in Own Shares
27/06/06                          Annual Report and Accounts
28/06/06                          Transaction in Own Shares
29/06/06                          Director/PDMR Shareholding
30/06/06                          Director/PDMR Shareholding
04/07/06                          Director/PDMR Shareholding
13/07/06                          Holding(s) in Company
21/07/06                          Director/PDMR Shareholding

2.     Documents filed with the Registrar of Companies

The following documents have been filed by the Company with the Registrar of 
Companies at Companies House during the previous 12 months.  Copies of these 
documents may be obtained from

Companies House
Crown Way
Cardiff
CF14 3UZ
Tel:
Email:  [e-mail]

Or, if you are a registered user, through Companies House Direct at
www.direct.companieshouse.gov.uk

       Date of     Type             Description
       filing

       01/07/05    88(2)            Return of allotment of shares
       14/07/05    88(2)            Return of allotment of shares
       21/07/05    88(2)            Return of allotment of shares
       11/08/05    88(2)            Return of allotment of shares
       12/08/05    -                Special and Ordinary resolutions passed at 
                                    AGM and New Articles of Association
       01/09/05    88(2)            Return of allotment of shares
       12/09/05    88(2)            Return of allotment of shares
       15/09/05    88(2)            Return of allotment of shares
       20/09/05    88(2)            Return of allotment of shares
       22/09/05    88(2)            Return of allotment of shares
       23/09/05    -                2005 Annual Report and Financial 
                                    Statements
       28/09/05    88(2)            Return of allotment of shares
       28/09/05    88(2)            Return of allotment of shares
       05/10/05    88(2)            Return of allotment of shares
       06/10/05    88(2)            Return of allotment of shares
       14/10/05    88(2)            Return of allotment of shares
       19/10/05    88(2)            Return of allotment of shares
       21/10/05    363a             Annual Return
       27/10/05    88(2)            Return of allotment of shares
       10/11/05    88(2)            Return of allotment of shares
       17/11/05    88(2)            Return of allotment of shares
       23/11/05    88(2)            Return of allotment of shares
       13/12/05    88(2)            Return of allotment of shares
       19/12/05    88(2)            Return of allotment of shares
       22/12/05    88(2)            Return of allotment of shares
       12/01/06    88(2)            Return of allotment of shares
       20/01/06    88(2)            Return of allotment of shares
       02/02/06    88(2)            Return of allotment of shares
       09/02/06    88(2)            Return of allotment of shares
       17/02/06    -                Special and Ordinary resolutions passed at 
                                    EGM
       22/02/06    88(2)            Return of allotment of shares
       28/02/06    123              Increase in nominal capital (B shares)
       01/03/06    88(2)            Return of allotment of shares
       13/03/06    88(2)            Return of allotment of shares
       22/03/06    88(2)            Return of allotment of shares
       06/04/06    G122             Share consolidation, redemption of B shares 
                                    and conversion of B shares into Deferred 
                                    shares
       04/04/06    88(2)            Return of allotment of shares
       04/04/06    88(2)            Return of allotment of shares
       04/04/06    88(2)            Return of allotment of shares
       12/07/06    169              Return by a company purchasing its own 
                                    shares
       12/07/06    122              Notice of cancellation of Ordinary shares
       12/07/06    122              Redemption at par of non-cumulative 
                                    redeemable preference shares and redemption 
                                    of Deferred shares
       24/07/06    -                2006 Annual Report and Financial Statements

3.     Documents filed with the Financial Services Authority and sent to 
shareholders

The following documents have been filed by the Company with the Financial
Services Authority and sent to shareholders during the previous 12 months. 
These documents may be viewed at the UK Listing Authority's Document Viewing
Facility at 25 The North Colonnade, Canary Wharf, London E14 5HS.  Copies of
these documents are also available on request from the Company's registered
office at Peninsula House, Rydon Lane, Exeter, Devon EX2 7HR.

Date of     Document
filing

29/07/05    Resolutions passed at Annual General Meeting on 28/07/05
30/08/05    SCRIP Dividend Alternative Circular, Advice of Entitlement and Form 
            of Election/Mandate
20/01/06    Interim Report 2005
15/02/06    Resolutions passed at Extraordinary General Meeting on 15/02/06
26/06/06    Annual Report and Accounts 2006, Notice of Annual General Meeting 
            and Form of Proxy

4.     Contacts

For further information, please contact:

M Heeley
Assistant Company Secretary
01392 443060


24 July 2006

www.pennon-group.co.uk


End transmission




                      This information is provided by RNS
            The company news service from the London Stock Exchange