Centrica plc

26 October 2017

Publication of�Base Prospectus in respect of Centrica plc's existing Euro Medium Term Note Programme

The following�base prospectus (the Base Prospectus) has been approved by the UK Listing Authority in respect of the annual update of Centrica plc's Euro Medium Term Note Programme and is available for viewing:

Centrica plc U.S.$10,000,000,000 Euro Medium Term Note Programme, dated� 26 October 2017

To view the full document, please paste the following�URL�into the address bar of your browser.

http://www.rns-pdf.londonstockexchange.com/rns/7525U_-2017-10-26.pdf

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A copy of the Base Prospectus has also been submitted to the National Storage Mechanism and will shortly be available for inspection at: www.morningstar.co.uk/uk/NSM.

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For further information, please contact:

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Centrica plc

Millstream

Maidenhead Road

Windsor

Berkshire SL4 5GD

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Telephone: +44 1753 494165

Fax: +44 1753 494176

Email: [email protected]

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DISCLAIMER - INTENDED ADDRESSEES

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Please note that the information contained in the Base Prospectus may be addressed to and/or targeted at persons who are residents of particular countries (specified in the Base Prospectus) only and is not intended for use and should not be relied upon by any person outside these countries and/or to whom the offer contained in the Base Prospectus is not addressed. Prior to relying on the information contained in the Base Prospectus you must ascertain from the Base Prospectus whether or not you are part of the intended addressees of the information contained therein.

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Your right to access this service is conditional upon complying with the above requirement.�

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ENDS

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Centrica plc is listed on the London Stock Exchange (CNA)

Registered Office: Millstream, Maidenhead Road, Windsor, Berkshire SL4 5GD

Registered in England & Wales number: 3033654

Legal Entity Identifier number: E26EDV109X6EEPBKVH76

ISIN number: GB00B033F229

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