The Oil and Pipelines Agency (OPA) is a statutory corporation of the Ministry of Defence (MoD) in the United Kingdom. Its current role is to operate six coastal Oil Fuel Depots on behalf of the MoD. The OPA was also previously responsible for the management of the Government Pipelines and Storage System (GPSS), until its sale in 2015. The OPA is the MoD’s professional expert on bulk fuels storage and transportation by pipeline.