Annual Information Update

Centrica PLC
                  

                             Centrica Plc

        Annual Information Update - 12 Months to 31 March 2006

In accordance with Prospectus Rule 5.2 the following lists have been prepared
referring to or containing all information that has been published or made
available to the public by Centrica plc over the previous 12 months in
compliance with its obligations under Community and national laws and rules
dealing with the regulation of securities, issuers of securities and securities
markets.

In accordance with Article 27(3) of the Prospectus Directive Regulation, it is
acknowledged that whilst the information referred to below was up to date at the
time of publication, such disclosures may, at any time, become out of date due
to changing circumstances.

1) Announcements made via a Regulatory Information Service:

Date            Regulatory Headline                              Via
31-Mar-06       Annual report & accounts                         BZN
24-Mar-06       Additional Listing                               RNS
21-Mar-06       Director/PDMR Shareholding                       BZN
14-Mar-06       Directorate Change                               BZN
06-Mar-06       Holding(s) in Company                            BZN
06-Mar-06       Additional Listing                               RNS
03-Mar-06       Acquisition                                      BZN
28-Feb-06       Director/PDMR Shareholding                       BZN
23-Feb-06       Final Results                                    BZN
21-Feb-06       Director/PDMR Shareholding                       BZN
17-Feb-06       British Gas Statement on Energy Prices           BZN
02-Feb-06       Acquisition                                      BZN
25-Jan-06       Holding(s) in Company                            BZN
20-Jan-06       Director/PDMR Shareholding                       BZN
18-Jan-06       Transaction in Own Shares                        RNS
17-Jan-06       Transaction in Own Shares                        RNS
16-Jan-06       Transaction in Own Shares                        RNS
13-Jan-06       Transaction in Own Shares                        RNS
13-Jan-06       Transaction in Own Shares                        RNS
12-Jan-06       Transaction in Own Shares                        RNS
11-Jan-06       Transaction in Own Shares                        RNS
10-Jan-06       Transaction in Own Shares                        RNS
09-Jan-06       Transaction in Own Shares                        RNS
06-Jan-06       Transaction in Own Shares                        RNS
05-Jan-06       Transaction in Own Shares                        RNS
03-Jan-06       Transaction in Own Shares                        RNS
30-Dec-05       Transaction in Own Shares                        BZN
29-Dec-05       Director/PDMR Shareholding                       BZN
22-Dec-05       Transaction in Own Shares                        RNS
20-Dec-05       Director/PDMR Shareholding                       BZN
19-Dec-05       Disposal                                         BZN
19-Dec-05       Acquisition                                      RNS
16-Dec-05       Trading Statement                                BZN
08-Dec-05       Transaction in Own Shares                        RNS
07-Dec-05       Centrica Storage Gas Capacity                    BZN
06-Dec-05       North America Presentation                       BZN
05-Dec-05       Transaction in Own Shares                        RNS
02-Dec-05       Acquisition                                      RNS
30-Nov-05       Transaction in Own Shares                        RNS
29-Nov-05       Transaction in Own Shares                        RNS
25-Nov-05       Merger Update                                    RNS
24-Nov-05       Transaction in Own Shares                        RNS
23-Nov-05       Director/PDMR Shareholding                       BZN
22-Nov-05       Transaction in Own Shares                        RNS
21-Nov-05       Transaction in Own Shares                        RNS
18-Nov-05       Director/PDMR Shareholding                       BZN
17-Nov-05       Transaction in Own Shares                        RNS
16-Nov-05       Transaction in Own Shares                        RNS
11-Nov-05       Transaction in Own Shares                        RNS
09-Nov-05       Publication of Prospectus                        BZN
09-Nov-05       Transaction in Own Shares                        RNS
02-Nov-05       Blocklisting Interim Review                      BZN
27-Oct-05       Transaction in Own Shares                        RNS
26-Oct-05       Update on exploration drilling                   BZN
25-Oct-05       Transaction in Own Shares                        RNS
21-Oct-05       Transaction in Own Shares                        RNS
20-Oct-05       Director/PDMR Shareholding                       BZN
19-Oct-05       Transaction in Own Shares                        RNS
18-Oct-05       Transaction in Own Shares                        RNS
18-Oct-05       Update on exploration progress                   BZN
17-Oct-05       Transaction in Own Shares                        RNS
12-Oct-05       Transaction in Own Shares                        RNS
11-Oct-05       Disposal                                         BZN
10-Oct-05       Transaction in Own Shares                        RNS
07-Oct-05       Transaction in Own Shares                        RNS
06-Oct-05       Transaction in Own Shares                        RNS
05-Oct-05       Transaction in Own Shares                        RNS
04-Oct-05       Transaction in Own Shares                        RNS
04-Oct-05       Director/PDMR Shareholding                       BZN
04-Oct-05       Director/PDMR Shareholding                       BZN
03-Oct-05       Transaction in Own Shares                        RNS
03-Oct-05       Director Declaration                             BZN
03-Oct-05       Completion of Offshore Agreement                 BZN
30-Sep-05       Trustee share purchase                           BZN
29-Sep-05       Acquisition                                      BZN
26-Sep-05       Project Update                                   RNS
22-Sep-05       Share Buyback Programmes                         BZN
22-Sep-05       Acquisition of Interest in Exploration Licence   BZN
21-Sep-05       Transaction in Own Shares                        RNS
20-Sep-05       Transaction in Own Shares                        RNS
20-Sep-05       Director/PDMR Shareholding                       BZN
20-Sep-05       Disposal                                         RNS
20-Sep-05       Acquisition                                      BZN
19-Sep-05       Transaction in Own Shares                        RNS
16-Sep-05       Transaction in Own Shares                        RNS
15-Sep-05       Directorate Change                               BZN
15-Sep-05       Interim Results                                  BZN
09-Sep-05       Holding(s) in Company                            BZN
09-Sep-05       British Gas Residential Energy Price Changes     BZN
07-Sep-05       Holding(s) in Company                            BZN
02-Sep-05       Director Declaration                             BZN
30-Aug-05       Disposal of Equity Gas Interest                  BZN
22-Aug-05       Director/PDMR Shareholding                       BZN
19-Aug-05       Transaction in Own Shares                        RNS
18-Aug-05       Transaction in Own Shares                        RNS
17-Aug-05       Transaction in Own Shares                        RNS
16-Aug-05       Transaction in Own Shares                        RNS
08-Aug-05       Acquisition                                      BZN
21-Jul-05       Director/PDMR Shareholding                       BZN
21-Jul-05       Directorate Change                               BZN
20-Jul-05       Transaction in Own Shares                        RNS
19-Jul-05       Transaction in Own Shares                        RNS
15-Jul-05       Centrica Confirms Job Reductions in British Gas  BZN
15-Jul-05       Centrica to Participate in North Sea Exploration BZN
15-Jul-05       Centrica Selected as Partner in Canvey LNG       BZN
                 Project
14-Jul-05       Transaction in Own Shares                        RNS
13-Jul-05       Transaction in Own Shares                        RNS
12-Jul-05       Transaction in Own Shares                        RNS
08-Jul-05       Transaction in Own Shares                        RNS
07-Jul-05       Transaction in Own Shares                        RNS
07-Jul-05       Change of Adviser                                BZN
06-Jul-05       Transaction in Own Shares                        RNS
05-Jul-05       Transaction in Own Shares                        RNS
04-Jul-05       Transaction in Own Shares                        RNS
30-Jun-05       Transaction in Own Shares                        RNS
24-Jun-05       Acquisition                                      BZN
24-Jun-05       Trading Statement                                BZN
22-Jun-05       Transaction in Own Shares                        RNS
22-Jun-05       Director Shareholding                            BZN
22-Jun-05       Director Shareholding                            BZN
21-Jun-05       Transaction in Own Shares                        RNS
20-Jun-05       Transaction in Own Shares                        RNS
16-Jun-05       Transaction in Own Shares                        RNS
16-Jun-05       Director Shareholding                            BZN
15-Jun-05       Transaction in Own Shares                        RNS
14-Jun-05       Transaction in Own Shares                        RNS
13-Jun-05       Transaction in Own Shares                        RNS
13-Jun-05       Transaction in Own Shares                        RNS
09-Jun-05       Transaction in Own Shares                        RNS
08-Jun-05       Transaction in Own Shares                        RNS
07-Jun-05       Transaction in Own Shares                        RNS
06-Jun-05       Transaction in Own Shares                        RNS
06-Jun-05       Acquisition                                      BZN
03-Jun-05       Transaction in Own Shares                        RNS
02-Jun-05       Transaction in Own Shares                        RNS
23-May-05       Director Shareholding                            BZN
19-May-05       Acquisition                                      RNS
19-May-05       Disposal                                         BZN
18-May-05       Transaction in Own Shares                        RNS
16-May-05       Transaction in Own Shares                        RNS
09-May-05       Result of AGM                                    BZN
09-May-05       AGM Statement                                    BZN
04-May-05       Transaction in Own Shares                        RNS
04-May-05       Statement re IFRS Restatement of 2004 Final      BZN
                 Results
03-May-05       Blocklisting Interim Review                      BZN
29-Apr-05       Transaction in Own Shares                        RNS
28-Apr-05       Transaction in Own Shares                        RNS
27-Apr-05       Transaction in Own Shares                        RNS
22-Apr-05       Acquisition of telecoms specialist               BZN
21-Apr-05       Director Shareholding                            BZN
21-Apr-05       Director Shareholding                            BZN
18-Apr-05       Transaction in Own Shares                        RNS
15-Apr-05       New Contract                                     RNS
12-Apr-05       Director Shareholding                            BZN
08-Apr-05       Director Shareholding                            BZN
05-Apr-05       Director Shareholding                            BZN
04-Apr-05       Additional Listing                               RNS

Copies of Announcements made via a Regulatory Information Service can be
obtained from the company's website www.centrica.com

2) Documents filed at Companies House:

Date           Form
10-Mar-06      Annual Return 363a
09-Mar-06      Return of allotments 88(2)
08-Mar-06      Return of allotments 88(2)
08-Mar-06      Purchase of own shares 169
07-Mar-06      Return of allotments 88(2)
06-Mar-06      Return of allotments 88(2)
27-Feb-06      Return of allotments 88(2)
27-Feb-06      Return of allotments 88(2)
27-Feb-06      Return of allotments 88(2)
22-Feb-06      Return of allotments 88(2)
15-Feb-06      Return of allotments 88(2)
15-Feb-06      Return of allotments 88(2)
15-Feb-06      Purchase of own shares 169
15-Feb-06      Purchase of own shares 169
03-Feb-06      Purchase of own shares 169
31-Jan-06      Return of allotments 88(2)
25-Jan-06      Return of allotments 88(2)
23-Jan-06      Return of allotments 88(2)
23-Jan-06      Return of allotments 88(2)
23-Jan-06      Return of allotments 88(2)
20-Jan-06      Purchase of own shares 169
11-Jan-06      Purchase of own shares 169
11-Jan-06      Purchase of own shares 169
09-Jan-06      Return of allotments 88(2)
05-Jan-06      Return of allotments 88(2)
04-Jan-06      Return of allotments 88(2)
28-Dec-05      Return of allotments 88(2)
20-Dec-05      Return of allotments 88(2)
20-Dec-05      Return of allotments 88(2)
20-Dec-05      Return of allotments 88(2)
14-Dec-05      Purchase of own shares 169
07-Dec-05      Purchase of own shares 169
02-Dec-05      Return of allotments 88(2)
30-Nov-05      Return of allotments 88(2)
24-Nov-05      Return of allotments 88(2)
24-Nov-05      Return of allotments 88(2)
24-Nov-05      Return of allotments 88(2)
18-Nov-05      Purchase of own shares 169
16-Nov-05      Purchase of own shares 169
16-Nov-05      Purchase of own shares 169
15-Nov-05      Purchase of own shares 169
14-Nov-05      Return of allotments 88(2)
10-Nov-05      Return of allotments 88(2)
02-Nov-05      Return of allotments 88(2)
02-Nov-05      Return of allotments 88(2)
27-Oct-05      Return of allotments 88(2)
27-Oct-05      Return of allotments 88(2)
27-Oct-05      Return of allotments 88(2)
27-Oct-05      Return of allotments 88(2)
27-Oct-05      Purchase of own shares 169
27-Oct-05      Purchase of own shares 169
26-Oct-05      Return of allotments 88(2)
19-Oct-05      Return of allotments 88(2)
17-Oct-05      Return of allotments 88(2)
12-Oct-05      Purchase of own shares 169
29-Sept-05     Return of allotments 88(2)
23-Sept-05     Purchase of own shares 169
21-Sept-05     Return of allotments 88(2)
19-Sept-05     Return of allotments 88(2)
19-Sept-05     Return of allotments 88(2)
19-Sept-05     Return of allotments 88(2)
13-Sept-05     Return of allotments 88(2)
09-Sept-05     Director's particulars 288a
05-Sept-05     Return of allotments 88(2)
01-Sept-05     Return of allotments 88(2)
30-Aug-05      Purchase of own shares 169
30-Aug-05      Purchase of own shares 169
25-Aug-05      Purchase of own shares 169
25-Aug-05      Return of allotments 88(2)
24-Aug-05      Return of allotments 88(2)
24-Aug-05      Return of allotments 88(2)
24-Aug-05      Return of allotments 88(2)
15-Aug-05      Return of allotments 88(2)
11-Aug-05      Return of allotments 88(2)
02-Aug-05      Return of allotments 88(2)
29-Jul-05      Purchase of own shares 169
29-Jul-05      Purchase of own shares 169
29-Jul-05      Purchase of own shares 169
29-Jul-05      Purchase of own shares 169
28-Jul-05      Return of allotments 88(2)
28-Jul-05      Return of allotments 88(2)
23-Jul-05      Return of allotments 88(2)
21-Jul-05      Return of allotments 88(2)
22-Jul-05      Return of allotments 88(2)
20-Jul-05      Purchase of own shares 169
20-Jul-05      Return of allotments 88(2)
15-Jul-05      Return of allotments 88(2)
15-Jul-05      Return of allotments 88(2)
14-Jul-05      Return of allotments 88(2)
12-Jul-05      Return of allotments 88(2)
12-Jul-05      Return of allotments 88(2)
12-Jul-05      Return of allotments 88(2)
11-Jul-05      Return of allotments 88(2)
11-Jul-05      Return of allotments 88(2)
07-Jul-05      Return of allotments 88(2)
02-Jul-05      Return of allotments 88(2)
30-Jun-05      Return of allotments 88(2)
29-Jun-05      Purchase of own shares 169
10-Jun-05      Purchase of own shares 169
09-Jun-05      Return of allotments 88(2)
09-Jun-05      Return of allotments 88(2)
01-Jun-05      Return of allotments 88(2)
26-May-05      Memorandum and Articles of Association
26-May-05      Special Resolution to alter Memorandum and Articles of
                Association
26-May-05      Purchase of own shares 169
26-May-05      Return of allotments 88(2)
23-May-05      Purchase of own shares 169
19-May-05      Return of allotments 88(2)
17-May-05      Return of allotments 88(2)
11-May-05      Return of allotments 88(2)
11-May-05      Return of allotments 88(2)
11-May-05      Purchase of own shares 169
29-Apr-05      Return of allotments 88(2)
29-Apr-05      Return of allotments 88(2)
29-Apr-05      Return of allotments 88(2)
28-Apr-05      Return of allotments 88(2)
27-Apr-05      Return of allotments 88(2)
27-Apr-05      Return of allotments 88(2)
21-Apr-05      Return of allotments 88(2)
20-Apr-05      Return of allotments 88(2)
20-Apr-05      Return of allotments 88(2)
18-Apr-05      Return of allotments 88(2)
18-Apr-05      Return of allotments 88(2)
15-Apr-05      Return of allotments 88(2)
15-Apr-05      Purchase of own shares 169
15-Apr-05      Purchase of own shares 169
15-Apr-05      Purchase of own shares 169
13-Apr-05      Director's particulars 288c
07-Apr-05      Return of allotments 88(2)
06-Apr-05      Return of allotments 88(2)
06-Apr-05      Amended Group of Companies Accounts to 31 December 2004
05-Apr-05      Return of allotments 88(2)
04-Apr-05      Return of allotments 88(2)

Copies of documents filed at Companies House can be obtained from Companies
House, Crown Way, Cardiff CF14 3UZ.

3) Documents filed with the Financial Services Authority Document Viewing
Facility:
Date           Brief Description of Document(s)
30-Mar-06      Notice of Annual General Meeting
30-Mar-06      Annual Report & Accounts for the year ended 31 December
                2005

Copies of documents filed with the Financial Services Authority Document Viewing
Facility can be obtained from the Financial Services Authority, 25 The North
Colonnade, Canary Wharf, London, E14 5HS.

Further enquiries:

Derek Woodward

Head of Secretariat

3 April 2006

01753 494006