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: 01/11/2012 to 30/04/2013

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

5,663,011 ORDINARY 6 14/81p

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

662,955 ORDINARY 6 14/81p

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

5,000,056 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

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

5,199,929,692 as at 30 April 2013

Contact for Queries:

Name: Claire Spencer

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: 01/11/2012 to 30/04/2013

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

3,168,419 ORDINARY 6 14/81p

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

254,503 ORDINARY 6 14/81p

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

2,913,916 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

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

5,199,929,692 as at 30 April 2013

Contact for Queries:

Name: Claire Spencer

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: 01/11/2012 to 30/04/2013

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

1,313,162 ORDINARY 6 14/81p

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

436,917 ORDINARY 6 14/81p

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

876,245 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

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

5,199,929,692 as at 30 April 2013

Contact for Queries:

Name: Claire Spencer

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: 01/11/2012 to 30/04/2013

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

6,484,922 ORDINARY 6 14/81p

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

26,974 ORDINARY 6 14/81p

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

6,457,948 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

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

5,199,929,692 as at 30 April 2013

Contact for Queries:

Name: Claire Spencer

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: 01/11/2012 to 30/04/2013

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

1,383,751 ORDINARY 6 14/81p

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

81,210 ORDINARY 6 14/81p

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

1,302,541 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

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

5,199,929,692 as at 30 April 2013

Contact for Queries:

Name: Claire Spencer

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 Employee Share Purchase Plan

3. Period of return:

From: 01/11/2012 to 30/04/2013

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

183,421 ORDINARY 6 14/81p

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

30,825 ORDINARY 6 14/81p

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

152,596 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

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

5,199,929,692 as at 30 April 2013

Contact for Queries:

Name: Claire Spencer

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: 01/11/2012 to 30/04/2013

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

1,035,903 ORDINARY 6 14/81p

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

nil

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

1,035,903 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

2,000,000 ORDINARY 6 14/81p 14/03/2012

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

5,199,929,692 as at 30 April 2013

Contact for Queries:

Name: Claire Spencer

Tel: [phone]

Address: Centrica plc, Millstream, Maidenhead Road, Windsor, Berks SL4 5GD