Block listing Interim Review

Centrica plc (the 'Company')

1 November 2021

BLOCK LISTING SIX MONTHLY RETURN

Schedule 5

Date: 1 November 2021

Name of applicant:

Centrica plc

Name of scheme:

Centrica Sharesave Scheme

Period of return:

From:

01 May 2021

To:

31 October 2021

Balance of unallotted securities under scheme(s) from previous return:

5,000,056 ORDINARY 6 14/81p

Plus: The amount by which the block scheme(s) has been increased since the date of the last return (if any increase has been applied for):

0

Less: Number of securities issued/allotted under scheme(s) during period (see LR3.5.7G):

0

Equals: Balance under scheme(s) not yet issued/allotted at end of period:

5,000,056 ORDINARY 6 14/81p

Name of contact:

James Dickinson

Telephone number of contact:

+44 (0)1753 494000

BLOCK LISTING SIX MONTHLY RETURN

Schedule 5

Date: 1 November 2021

Name of applicant:

Centrica plc

Name of scheme:

Centrica Share Incentive Plan

Period of return:

From:

01 May 2021

To:

31 October 2021

Balance of unallotted securities under scheme(s) from previous return:

2,438,916 ORDINARY 6 14/81p

Plus: The amount by which the block scheme(s) has been increased since the date of the last return (if any increase has been applied for):

0

Less: Number of securities issued/allotted under scheme(s) during period (see LR3.5.7G):

125,413 ORDINARY 6 14/81p

Equals: Balance under scheme(s) not yet issued/allotted at end of period:

2,313,503 ORDINARY 6 14/81p

Name of contact:

James Dickinson

Telephone number of contact:

+44 (0)1753 494000

BLOCK LISTING SIX MONTHLY RETURN

Schedule 5

Date: 1 November 2021

Name of applicant:

Centrica plc

Name of scheme:

Centrica Long Term Incentive Scheme

Period of return:

From:

01 May 2021

To:

31 October 2021

Balance of unallotted securities under scheme(s) from previous return:

6,450,379 ORDINARY 6 14/81p

Plus: The amount by which the block scheme(s) has been increased since the date of the last return (if any increase has been applied for):

0

Less: Number of securities issued/allotted under scheme(s) during period (see LR3.5.7G):

14,813 ORDINARY 6 14/81p

Equals: Balance under scheme(s) not yet issued/allotted at end of period:

6,435,566 ORDINARY 6 14/81p

Name of contact:

James Dickinson

Telephone number of contact:

+44 (0)1753 494000

BLOCK LISTING SIX MONTHLY RETURN

Schedule 5

Date: 1 November 2021

Name of applicant:

Centrica plc

Name of scheme:

Centrica On Track Incentive Plan (incorporating the Centrica Conditional Share Incentive Plan)

Period of return:

From:

01 May 2021

To:

31 October 2021

Balance of unallotted securities under scheme(s) from previous return:

30,935,999 ORDINARY 6 14/81p

Plus: The amount by which the block scheme(s) has been increased since the date of the last return (if any increase has been applied for):

0

Less: Number of securities issued/allotted under scheme(s) during period (see LR3.5.7G):

212,202 ORDINARY 6 14/81p

Equals: Balance under scheme(s) not yet issued/allotted at end of period:

30,723,797 ORDINARY 6 14/81p

Name of contact:

James Dickinson

Telephone number of contact:

+44 (0)1753 494000

BLOCK LISTING SIX MONTHLY RETURN

Schedule 5

Date: 1 November 2021

Name of applicant:

Centrica plc

Name of scheme:

Centrica Long Term Incentive Plan

Period of return:

From:

01 May 2021

To:

31 October 2021

Balance of unallotted securities under scheme(s) from previous return:

1,200,000 ORDINARY 6 14/81p

Plus: The amount by which the block scheme(s) has been increased since the date of the last return (if any increase has been applied for):

0

Less: Number of securities issued/allotted under scheme(s) during period (see LR3.5.7G):

0

Equals: Balance under scheme(s) not yet issued/allotted at end of period:

1,200,000 ORDINARY 6 14/81p

Name of contact:

James Dickinson

Telephone number of contact:

+44 (0)1753 494000

Centrica plc is listed on the London Stock Exchange (CNA)Registered Office: Millstream, Maidenhead Road, Windsor, Berkshire SL4 5GD

Registered in England & Wales number: 3033654Legal Entity Identifier number: E26EDV109X6EEPBKVH76ISIN number: GB00B033F229