Blocklisting Interim Review

Blocklisting Interim Review

Centrica PLC

SCHEDULE 5

BLOCKLISTING SIX MONTHLY RETURN

1. Name of company

Centrica plc

2. Name of scheme

Centrica Sharesave scheme

3. Period of return:

From 08/05/2009 to 31/10/2009

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

42,587,874 ORDINARY 6 14/81p

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

7,908,174 ORDINARY 6 14/81p

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

34,679,700 ORDINARY 6 14/81p

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

8,246,046 ORDINARY 6 14/81p 25/10/2004
10,000,000 ORDINARY 6 14/81p 24/03/2005
25,000,000 ORDINARY 6 14/81p 27/04/2006
25,000,000 ORDINARY 6 14/81p 24/04/2007
18,000,000 ORDINARY 6 14/81p 15/04/2008
36,000,000 ORDINARY 6 14/81p 06/05/2009

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

5,130,100,541 as at 31 October 2009

Contact for Queries:

Name: Matthew Lodge
Tel: [phone]Tel: [phone]
Address: Centrica plc, Millstream, Maidenhead Road, Windsor, Berks SL4 5GD Address: Centrica plc, Millstream, Maidenhead Road, Windsor, Berks SL4 5GD

SCHEDULE 5

BLOCKLISTING SIX MONTHLY RETURN

1. Name of company

Centrica plc

2. Name of scheme

Centrica Executive Share Option scheme

3. Period of return:

From 08/05/2009 to 31/10/2009

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

15,092,900 ORDINARY 6 14/81p

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

5,137,149 ORDINARY 6 14/81p

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

9,955,751 ORDINARY 6 14/81p

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

2,628,006 ORDINARY 6 14/81p 25/10/2004
5,000,000 ORDINARY 6 14/81p 04/04/2005
10,000,000 ORDINARY 6 14/81p 24/03/2006
10,000,000 ORDINARY 6 14/81p 24/04/2007
10,000,000 ORDINARY 6 14/81p 06/05/2009

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

5,130,100,541 as at 31 October 2009

Contact for Queries:

Name: Matthew Lodge
Tel: [phone]Tel: [phone]
Address: Centrica plc, Millstream, Maidenhead Road, Windsor, Berks SL4 5GD Address: Centrica plc, Millstream, Maidenhead Road, Windsor, Berks SL4 5GD

SCHEDULE 5

BLOCKLISTING SIX MONTHLY RETURN

1. Name of company

Centrica plc

2. Name of scheme

Centrica Share Incentive Plan

3. Period of return:

From 08/05/2009 to 31/10/2009

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

4,651,106 ORDINARY 6 14/81p

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

382,514 ORDINARY 6 14/81p

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

4,268,592 ORDINARY 6 14/81p

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

265,283 ORDINARY 6 14/81p 25/10/2004
2,000,000 ORDINARY 6 14/81p 17/02/2005
500,000 ORDINARY 6 14/81p 15/04/2008
5,000,000 ORDINARY 6 14/81p 06/05/2009

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

5,130,100,541 as at 31 October 2009

Contact for Queries:

Name: Matthew Lodge
Tel: [phone]Tel: [phone]
Address: Centrica plc, Millstream, Maidenhead Road, Windsor, Berks SL4 5GD Address: Centrica plc, Millstream, Maidenhead Road, Windsor, Berks SL4 5GD

SCHEDULE 5

BLOCKLISTING SIX MONTHLY RETURN

1. Name of company

Centrica plc

2. Name of scheme

Centrica Long Term Incentive Scheme

3. Period of return:

From 08/05/2009 to 31/10/2009

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

10,938,911 ORDINARY 6 14/81p

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

612,103 ORDINARY 6 14/81p

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

10,326,808 ORDINARY 6 14/81p

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

10,000,000 ORDINARY 6 14/81p 03/03/2006
3,000,000 ORDINARY 6 14/81p 28/03/2007
10,000,000 ORDINARY 6 14/81p 15/04/2008
10,000,000 ORDINARY 6 14/81p 06/05/2009

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

5,130,100,541 as at 31 October 2009

Contact for Queries:

Name: Matthew Lodge
Tel: [phone]Tel: [phone]
Address: Centrica plc, Millstream, Maidenhead Road, Windsor, Berks SL4 5GD Address: Centrica plc, Millstream, Maidenhead Road, Windsor, Berks SL4 5GD

SCHEDULE 5

BLOCKLISTING SIX MONTHLY RETURN

1. Name of company

Centrica plc

2. Name of scheme

Centrica Share Award Scheme

3. Period of return:

From 08/05/2009 to 31/10/2009

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

6,062,956ORDINARY 6 14/81p

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

15,716 ORDINARY 6 14/81p

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

6,047,240 ORDINARY 6 14/81p

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

2,000,000 ORDINARY 6 14/81p 24/08/2006
1,000,000 ORDINARY 6 14/81p 15/04/2008
5,000,000 ORDINARY 6 14/81p 06/05/2009

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

5,130,100,541 as at 31 October 2009

Contact for Queries:

Name: Matthew Lodge
Tel: [phone]Tel: [phone]
Address: Centrica plc, Millstream, Maidenhead Road, Windsor, Berks SL4 5GD Address: Centrica plc, Millstream, Maidenhead Road, Windsor, Berks SL4 5GD

SCHEDULE 5

BLOCKLISTING SIX MONTHLY RETURN

1. Name of company

Centrica plc

2. Name of scheme

Centrica North American Share Purchase Plan

3. Period of return:

From 08/05/2009 to 31/10/2009

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

260,746 ORDINARY 6 14/81p

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

43,579 ORDINARY 6 14/81p

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

217,167 ORDINARY 6 14/81p

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

50,000 ORDINARY 6 14/81p 22/01/2007
100,000 ORDINARY 6 14/81p 15/04/2008
200,000 ORDINARY 6 14/81p 06/05/2009

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

5,130,100,541 as at 31 October 2009

Contact for Queries:

Name: Matthew Lodge
Tel: [phone]Tel: [phone]
Address: Centrica plc, Millstream, Maidenhead Road, Windsor, Berks SL4 5GD Address: Centrica plc, Millstream, Maidenhead Road, Windsor, Berks SL4 5GD