The Oil and Pipelines Agency (OPA) is a statutory corporation of the Ministry of Defence (MoD) in the United Kingdom.

[5] It was the successor organisation to the British National Oil Corporation (BNOC) in its responsibility for managing the Department of Energy's pipelines and storage depots.

Initially the GPSS had been operated under reimbursable, fully indemnified contracts by the British Pipeline Agency (BPA), Esso, Texaco and Shell.

In May 2012 the UK Government announced plans sell all or part of the GPSS[9] and legislation to enable it to do so was included in the Energy Act 2013.

A contractual agreement between the MoD and CLH ensured military fuel requirements continued to be met using the GPSS.

[12] The current responsibilities of the OPA include: to receive, store and deliver marine fuel to meet the MoD ‘s requirements; to manage, operate and maintain the Oil Fuel Depots; to manage and maintain the salt caverns at Plumley and Cape of Good Hope (Cheshire) Petroleum Storage Depot (PSD); and to attract third-party customers.