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 10/11/2010 to 06/06/11

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

27,070,092 ORDINARY 6 14/81p

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

4,529,912 ORDINARY 6 14/81p

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

22,540,180 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

5,168,179,192 as at 6 June 2011

Contact for Queries:

Name: Ros Charleston
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 10/11/10 to 06/06/11

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

2,639,727 ORDINARY 6 14/81p

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

575,839 ORDINARY 6 14/81p

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

4,681,070 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

5,168,179,192 as at 6 June 2011

Contact for Queries:

Name: Ros Charleston
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 10/11/10 to 06/06/11

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

3,333,352 ORDINARY 6 14/81p

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

452,803 ORDINARY 6 14/81p

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

2,880,549 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

5,168,179,192 as at 6 June 2011

Contact for Queries:

Name: Ros Charleston
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 10/11/2010 to 06/06/11

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

7,007,295 ORDINARY 6 14/81p

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

3,628,138 ORDINARY 6 14/81p

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

9,379,157 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

5,168,179,192 as at 6 June 2011

Contact for Queries:

Name: Ros Charleston
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 10/11/10 to 06/06/11

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

4,567,710 ORDINARY 6 14/81p

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

3,649,914 ORDINARY 6 14/81p

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

917,796 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

5,168,179,192 as at 6 June 2011

Contact for Queries:

Name: Ros Charleston
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 10/11/2010 to 06/06/11

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

145,516 ORDINARY 6 14/81p

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

43,615 ORDINARY 6 14/81p

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

301,901 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

5,168,179,192 as at 6 June 2011

Contact for Queries:

Name: Ros Charleston
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 10/11/2010 to 06/06/2011

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

631,973 ORDINARY 6 14/81p

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

2,780,060 ORDINARY 6 14/81p

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

1,351,913 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

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

in order for us to update our records

5,168,179,192 as at 6 June 2011

Contact for Queries:

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