Holding(s) in Company

Centrica PLC
                  




Centrica plc

Centrica plc received on 17 May 2006, a notification dated 15 May 2006, stating
that on 12 May 2006, the interest of Barclays PLC in Centrica plc constituted a
notifiable interest for the purposes of section 198 of the Companies Act 1985.

SCHEDULE 10

NOTIFICATION OF MAJOR INTERESTS IN SHARES

1. Name of company

Centrica plc

2. Name of shareholder(s) having a major interest

Barclays PLC

3. Please state whether notification indicates that it is in respect of holding
of the shareholder named in 2 above or in respect of a non-beneficial interest
or in the case of an individual holder if it is a holding of that person's
spouse or children under the age of 18
Not known

4. Name of the registered holder(s) and, if more than one holder, the number of
shares held by each of them
Barclays Global Fund Advisors                                          11,418,912
Barclays Global Investors Australia Ltd                                 1,338,107
Barclays Global Investors Canada Ltd                                      263,633
Barclays Life Assurance Co Ltd                                          6,145,232
Barclays Private Bank and Trust Ltd                                        18,935
Barclays Capital Inc                                                    1,058,874
Barclays Global Investors Japan Ltd                                     1,662,871
Barclays Private Bank Limited                                           2,342,898
Gerrard Limited                                                        18,034,600
Barclays Global Investors, N.A.                                        39,981,428
Barclays Bank Trust Company Ltd                                            99,885
Barclays Private Bank and Trust  Ltd                                      553,168
Barclays Capital Securities Ltd                                        71,311,373
Barclays Global Investors Ltd                                          52,226,498
Barclays Global Investors Japan Trust & Banking                         4,226,963

5. Number of shares / amount of stock acquired

Not known

6. Percentage of issued class

Not known

7. Number of shares / amount of stock disposed

                                                                               N/A

8. Percentage of issued class

                                                                               N/A

9. Class of security

Ordinary 6 14/81 pence

10. Date of transaction

Not known

11. Date company informed

17 May 2006

12. Total holding following this notification

                                                                       210,683,377

13. Total percentage holding of issued class following this notification

                                                                              5.80

14. Any additional information

None

15. Name of contact and telephone number for queries

Robin Healy  01753 494 017

16. Name and signature of authorised company official responsible for making
this notification
Robin Healy

Date of notification

17 May 2006