Centrica PLC — Regulatory Filings 2017

Jun 20, 2017

National Storage Mechanism | Additional information

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Cessation of Storage Operations at Rough

20 June 2017

Centrica plc

(“Centrica” or ‘the Company’)

Cessation of Storage Operations at Rough

On 12 April 2017, Centrica Storage Limited (“CSL”) announced that it was assessing the future pathway for Rough’s commercial operations.

CSL has now completed the wells testing programme and has analysed the results of this extensive programme. CSL has also completed a review into the feasibility of returning Rough to injection and storage operations and concluded that, as a result of the high operating pressures involved, and the fact that the wells and facilities are at the end of their design life and have suffered a number of different failure modes while testing, CSL cannot safely return the assets and facilities to injection and storage operations.

Furthermore, from a commercial perspective, an assessment of both the economics of seasonal storage today, and the costs of refurbishment or rebuilding the facility and replacing the wells, suggests that both pathways would not be economic.

As a consequence, CSL intends to make all relevant applications to permanently end Rough’s status as a storage facility, and to produce all recoverable cushion gas from the field, which is estimated at 183 bcf.

ENDS

Enquiries:

Centrica Investor Relations: +44 (0)1753 494900

Centrica Media Relations: +44 (0)1784 843000

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

Centrica plc

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