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 07/06/2011 to 28/10/11

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

22,540,180 ORDINARY 6 14/81p

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

2,953,760 ORDINARY 6 14/81p

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

19,586,420 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 to update our records

5,172,465,349 as at 28 October 2011

Contact for Queries:

Name: Chloe Barry

Tel: [phone]

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 07/06/2011 to 28/10/11

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

4,436,986 ORDINARY 6 14/81p (restated)

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

595,450 ORDINARY 6 14/81p

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

3,841,536 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

2,373,098 ORDINARY 6 14/81P 05/04/2011

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

5,172,465,349 as at 28 October 2011

Contact for Queries:

Name: Chloe Barry
Tel: [phone]
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 07/06/2011 to 28/10/11

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

2,880,549 ORDINARY 6 14/81p

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

375,185 ORDINARY 6 14/81p

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

2,505,364 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

5,172,465,349 as at 28 October 2011

Contact for Queries:

Name: Chloe Barry
Tel: [phone]
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 07/06/2011 to 28/10/11

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

9,379,157 ORDINARY 6 14/81p

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

297,940 ORDINARY 6 14/81p

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

9,081,217 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

6,000,000 ORDINARY 6 14/81p 05/04/2011

Please confirm total number of shares in issue at the end of the period

in order for us to update our records

5,172,465,349 as at 28 October 2011

Contact for Queries:

Name: Chloe Barry
Tel: [phone]
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 07/06/11 to 28/10/11

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

917,796 ORDINARY 6 14/81p

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

24,905 ORDINARY 6 14/81p

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

3,392,891 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

2,500,000 ORDINARY 6 14/81p 17/10/2011

Please confirm total number of shares in issue at the end of the period

in order for us to update our records

5,172,465,349 as at 28 October 2011

Contact for Queries:

Name: Chloe Barry
Tel: [phone]
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 07/06/2011 to 28/10/11

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

301,901 ORDINARY 6 14/81p

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

38,917 ORDINARY 6 14/81p

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

262,984 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

200,000 ORDINARY 6 14/81p 05/04/2011

Please confirm total number of shares in issue at the end of the period

in order for us to update our records

5,172,465,349 as at 28 October 2011

Contact for Queries:

Name: Chloe Barry
Tel: [phone]
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 Deferred and Matching Share Scheme

3. Period of return:

From 07/06/2011 to 28/10/2011

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

1,351,913 ORDINARY 6 14/81p

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

nil ORDINARY 6 14/81p

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

3,351,913 ORDINARY 6 14/81p

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

3,500,000 ORDINARY 6 14/81p 29/03/2010

3,500,000 ORDINARY 6 14/81p 05/04/2011

2,000,000 ORDINARY 6 14/81p 17/10/2011

Please confirm total number of shares in issue at the end of the period

in order for us to update our records

5,172,465,349 as at 28 October 2011

Contact for Queries:

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