Holding(s) in Company

Centrica PLC
                  

Centrica plc

Centrica plc received on 18 May 2006, a notification dated 16 May 2006, stating
that on 15 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 Life Assurance Co Ltd                    6,145,232
Barclays Global Fund Advisors                      11,444,954
Barclays Private Bank and Trust Ltd                553,168
Gerrard Limited                                    18,015,809
Barclays Global Investors Australia Ltd            1,361,793
Barclays Private Bank Limited                      2,340,596
Barclays Global Investors Canada Ltd               263,633
Barclays Global Investors Ltd                      52,386,657
Barclays Bank Trust Company Ltd                    106,730
Barclays Global Investors, N.A.                    40,342,580
Barclays Capital Securities Ltd                    5,187,084
Barclays Global Investors Japan Trust & Banking    4,226,963
Barclays Private Bank and Trust  Ltd
Barclays Capital Inc                               18,935
Barclays Global Investors Japan Ltd                1,130
                                                   1,662,871

5. Number of shares / amount of stock acquired

NA

6. Percentage of issued class

NA

7. Number of shares / amount of stock disposed

Not known

8. Percentage of issued class

Not known

9. Class of security

Ordinary 6 14/81 pence

10. Date of transaction

Not known

11. Date company informed

18 May 2006

12. Total holding following this notification

                                                                       144,058,135

13. Total percentage holding of issued class following this notification

                                                                              3.97

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

18 May 2006