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 01/11/2008 to 07/05/2009

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

7,533,908 ORDINARY 6 14/81p

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

946,034 ORDINARY 6 14/81p

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

42,587,874 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

5,116,001,306 as at 7 May 2009

Contact for Queries:

Name: Julia Foo
Tel: [phone]Tel: [phone]
Address: Centrica plc, Millstream, Maidenhead Road, Windsor, Berks SL4 5GDAddress: 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 01/11/2008 to 07/05/2009

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

5,499,279 ORDINARY 6 14/81p

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

406,379 ORDINARY 6 14/81p

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

15,092,900 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

5,116,001,306 as at 7 May 2009

Contact for Queries:

Name: Julia Foo
Tel: [phone]Tel: [phone]
Address: Centrica plc, Millstream, Maidenhead Road, Windsor, Berks SL4 5GDAddress: 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 01/11/2008 to 07/05/2009

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

93,379 ORDINARY 6 14/81p

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

442,273 ORDINARY 6 14/81p

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

4,651,106 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

5,116,001,306 as at 7 May 2009

Contact for Queries:

Name: Julia Foo
Tel: [phone]Tel: [phone]
Address: Centrica plc, Millstream, Maidenhead Road, Windsor, Berks SL4 5GDAddress: 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 01/11/2008 to 07/05/2009

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

7,289,423 ORDINARY 6 14/81p

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

6,350,512 ORDINARY 6 14/81p

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

10,938,911 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

5,116,001,306 as at 7 May 2009

Contact for Queries:

Name: Julia Foo
Tel: [phone]Tel: [phone]
Address: Centrica plc, Millstream, Maidenhead Road, Windsor, Berks SL4 5GDAddress: 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 01/11/2008 to 07/05/2009

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

2,342,655 ORDINARY 6 14/81p

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

1,279,699 ORDINARY 6 14/81p

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

6,062,956 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

5,116,001,306 as at 7 May 2009

Contact for Queries:

Name: Julia Foo
Tel: [phone]Tel: [phone]
Address: Centrica plc, Millstream, Maidenhead Road, Windsor, Berks SL4 5GDAddress: 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 01/11/2008 to 07/05/2009

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

81,921 ORDINARY 6 14/81p

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

21,175 ORDINARY 6 14/81p

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

260,746 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

5,116,001,306 as at 7 May 2009

Contact for Queries:

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