Block Listing Return

Centrica PLC
2 November 2001


                                  SCHEDULE 5

                       BLOCKLISTING SIX MONTHLY RETURN



1. Name of company

Centrica plc

2. Name of scheme

Centrica Sharesave Scheme

3. Period of return: From 1/05/2001 to 31/10/2001

4. Number and class of shares(s)
(amount of stock/debt security)
not issued under scheme at end of

last period

7,009,244 ORDINARY 5 5/9p

5. Number of shares issued/allotted
under scheme during period

6,808,280

6. Balance under scheme not yet issued/allotted
at end of period

7,200,964

7. Number and class of share(s)
(amount of stock/debt securities)
originally listed and the date of admission

10,013,517 ORDINARY 5 5/9p 10/05/99

15,000,000 ORDINARY 5 5/9p 10/05/00

7,000,000 ORDINARY 5 5/9p 17/05/01

Please confirm total number of shares in issue at the end of the period
in order for us to update our records

4,020,636,828 As at 31 October 2001


Contact for queries:               Address:

Name: Tracy Allen                  Centrica plc, Millstream, Maidenhead Road
                                   Windsor, Berkshire, SL4 5GD

                                   Telephone: [phone]



                                  SCHEDULE 5

                       BLOCKLISTING SIX MONTHLY RETURN



1. Name of company

Centrica plc

2. Name of scheme

Executive Share Option Scheme

3. Period of return: From 1/05/2001 to 31/10/2001

4. Number and class of shares(s)
(amount of stock/debt security)
not issued under scheme at end of

last period

1,901,532 ORDINARY 5 5/9p

5. Number of shares issued/allotted
under scheme during period

129,343

6. Balance under scheme not yet issued/allotted
at end of period

1,772,189

7. Number and class of share(s)
(amount of stock/debt securities)
originally listed and the date of admission

2,489,759 ORDINARY 5 5/9p 10/05/99


Please confirm total number of shares in issue at the end of the period
in order for us to update our records

4,020,636,828 As at 31 October 2001


Contact for queries:               Address:

Name: Tracy Allen                  Centrica plc, Millstream, Maidenhead Road
                                   Windsor, Berkshire, SL4 5GD

                                   Telephone: [phone]