National Storage Mechanism | Additional information

1 October 2025

Centrica plc

Completion of Cygnus gas field interest sale

Centrica plc is pleased to announce that Spirit Energy has completed the sale¹ of a 46.25% interest in the Cygnus gas field to Ithaca Energy plc for headline consideration of £116 million and the transfer of associated decommissioning liabilities.

Enquiries:

Investors and Analysts:	email: [email protected]
Media:	email: [email protected]	tel: +44 (0)1784 843000

Notes:

1. Transaction initially announced 20^th May 2025. Following completion of the transaction, Spirit Energy will retain a 15.00% interest in the Cygnus gas field.

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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