Annual Information Update

Pennon Group PLC
20 July 2007


PENNON GROUP PLC ('THE COMPANY')

ANNUAL INFORMATION UPDATE ('AIU') FOR 12 MONTHS UP TO AND INCLUDING 20 JULY 2007

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


24/07/06                     Annual Information Update
28/07/06                     Result of AGM
28/07/06                     Ordinary Share Subdivision
31/07/06                     Holding(s) in Company
01/08/06                     Holding(s) in Company
02/08/06                     Holding(s) in Company
02/08/06                     Holding(s) in Company
02/08/06                     Director/PDMR Shareholding
03/08/06                     Director/PDMR Shareholding
10/08/06                     Director/PDMR Shareholding
11/08/06                     Holding(s) in Company
16/08/06                     Additional Listing
16/08/06                     Holding(s) in Company
22/08/06                     Circ re: DRIP
22/08/06                     Director/PDMR Shareholding
04/09/06                     Director/PDMR Shareholding
04/09/06                     Director/PDMR Shareholding
19/09/06                     Director/PDMR Shareholding
20/09/06                     Director/PDMR Shareholding
21/09/06                     Director/PDMR Shareholding
21/09/06                     Director/PDMR Shareholding
25/09/06                     Director/PDMR Shareholding
26/09/06                     Director/PDMR Shareholding
27/09/06                     Trading Statement
05/10/06                     Director/PDMR Shareholding
06/10/06                     Director/PDMR Shareholding
06/10/06                     Director/PDMR Shareholding
09/10/06                     Director/PDMR Shareholding
09/10/06                     Director/PDMR Shareholding
10/10/06                     Director/PDMR Shareholding
11/10/06                     Holding(s) in Company
19/10/06                     Holding(s) in Company
20/10/06                     Director/PDMR Shareholding
08/11/06                     Director/PDMR Shareholding
09/11/06                     Holding(s) in Company
16/11/06                     Holding(s) in Company
22/11/06                     Director/PDMR Shareholding
22/11/06                     Holding(s) in Company
23/11/06                     Holding(s) in Company
27/11/06                     Interim Results
20/12/06                     Holding(s) in Company
21/12/06                     Total Voting Rights
21/12/06                     Director/PDMR Shareholding
04/01/07                     Total Voting Rights
05/01/07                     2006 Interim Report
10/01/07                     Total Voting Rights
18/01/07                     Additional Listing
19/01/07                     Total Voting Rights
22/01/07                     Holding(s) in Company
22/01/07                     Director/PDMR Shareholding
26/01/07                     Holding(s) in Company
26/01/07                     Re: Contract
31/01/07                     Holding(s) in Company
31/01/07                     Blocklisting Interim Review
06/02/07                     Holding(s) in Company
13/02/07                     Acquisition
14/02/07                     Holding(s) in Company
20/02/07                     Director/PDMR Shareholding
22/02/07                     Holding(s) in Company
26/02/07                     Circ re: DRIP
27/02/07                     Holding(s) in Company
28/02/07                     Total Voting Rights
06/03/07                     Director/PDMR Shareholding
20/03/07                     Director/PDMR Shareholding
20/03/07                     Holding(s) in Company
21/03/07                     Holding(s) in Company
26/03/07                     Trading Statement
28/03/07                     Holding(s) in Company
29/03/07                     Director/PDMR Shareholding
30/03/07                     Total Voting Rights
11/04/07                     Holding(s) in Company
13/04/07                     Director/PDMR Shareholding
17/04/07                     Director/PDMR Shareholding
20/04/07                     Director/PDMR Shareholding
08/05/07                     New Subsidiary Director
29/05/7                      Director/PDMR Shareholding
31/05/07                     Preliminary Results
31/05/07                     Total Voting Rights
05/06/07                     Director/PDMR Shareholding
07/06/07                     Transaction in own shares
08/06/07                     Transaction in own shares
12/06/07                     Transaction in own shares
13/06/07                     Transaction in own shares
18/06/07                     Transaction in own shares
19/06/07                     Transaction in own shares
20/06/07                     Director/PDMR Shareholding
20/06/07                     Transaction in own shares
21/06/07                     Transaction in own shares
22/06/07                     Transaction in own shares
25/06/07                     Transaction in own shares
27/06/07                     Annual Report and Accounts
27/06/07                     Transaction in own shares
28/06/07                     Transaction in own shares
29/06/07                     Total Voting Rights
29/06/07                     Transaction in own shares
02/07/07                     Transaction in own shares
03/07/07                     Director/PDMR Shareholding
03/07/07                     Transaction in own shares
04/07/07                     Director/PDMR Shareholding
04/07/07                     Director/PDMR Shareholding
06/07/07                     Transaction in own shares
09/07/07                     Transaction in own shares
10/07/07                     Transaction in own shares
11/07/07                     Director/PDMR Shareholding
11/07/07                     Transaction in own shares
17/07/07                     Transaction in own shares

          
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 filing     Type      Description


24/07/06           -         2006 Annual Report & Financial Statements
28/07/06           169       Purchase of 25,000 122.1p shares
28/07/06           122       Cancellation of 25,000 122.1p shares
28/07/06           122       Cancellation of one special rights redeemable 
                             preference share
02/04/06           -         Special and Ordinary resolutions passed at AGM
03/04/06           -         Updated Memorandum and Articles
07/08/06           288c      Change of address of Director
08/08/06           122       Cancellation of B shares and Deferred Shares
15/08/06           88(2)     355,091,541 shares
15/08/06           122       Three for one share split
15/08/06           288b      Director resignation
14/08/06           288a      Director appointment
18/08/06           288c      Change of address of Director
22/08/06           88(2)     289 shares
24/08/06           288c      Change of address of Director
01/09/06           88(2)     880,209 shares
21/09/06           88(2)     17,142 shares
26/09/06           88(2)     61,242 shares
26/09/06           88(2)     9,810 shares
26/09/06           169       Purchase of 50,000 shares
02/10/06           88(2)     8,793 shares
05/10/07           88(2)     7,221 shares
16/10/07           88(2)     25,018 shares
19/10/06           353       Register of Members
19/10/06           88(2)     2,094 shares
18/10/06           363a      Annual Return
20/10/06           122       Cancellation of 50,000 shares
26/10/06           88(2)     1,047 shares
02/11/06           88(2)     1,857 shares
07/11/06           88(2)     5,235 shares
24/11/06           88(2)     4,188 shares
07/12/06           88(2)     1,047 shares
13/12/06           88(2)     3,025 shares
13/12/06           288c      Change of address of Company Secretary
05/01/07           88(2)     9,444 shares
10/01/07           88(2)     8,857 shares
18/01/07           88(2)     1,047 shares
24/01/07           88(2)     627 shares
07/02/07           88(2)     12,012 shares
12/02/07           88(2)     13,401 shares
08/03/07           88(2)     5,463 shares
14/03/07           88(2)     3,270 shares
30/05/07           88(2)     395 shares
02/07/07           88(2)     828 shares
10/07/07           169(1B)   Purchase of 250,000 treasury shares
16/07/07           169       Purchase of 100,000 shares
16/07/07           122       Cancellation of 100,000 shares
16/07/07           169A(2)   Transfer of 828 treasury shares
16/07/07           169(1B)   Purchase of 126,800 treasury shares
16/07/07           169       Purchase of 450,000 shares
16/07/07           122       Cancellation of 450,000 shares

     
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 filing      Document


28/07/06            Resolutions passed at Annual General Meeting on 27/07/06
21/08/06            Dividend Re-investment Plan Booklet & Application Form
04/01/07            Interim Report 2006
23/02/07            Dividend Re-investment Plan Booklet & Application Form
27/06/07            Annual Report & Accounts 2007, Notice of Annual General 
                    Meeting and Form of Proxy


4.     Contacts

For further information, please contact:

C P Richards
Interim Assistant Company Secretary
01392 443060

20 July 2007

www.pennon-group.co.uk

End transmission


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