The Royal Navy does not maintain vessels exclusively employed for fishery protection activities; however, it does have and operate three River Class Offshore Patrol Vessels currently in UK waters, that conduct fishery patrol tasking alongside their other Defence tasks. HMS MERSEY, TYNE and SEVERN are, and will continue to be, used to fulfil the Royal Navy's commitments under the Memorandum of Understanding between the Royal Navy and the Marine Management Organisation. In addition, the Royal Navy maintains a number of high readiness forces in UK waters that could be called upon to assist if requested.
HMS CLYDE was operated by the Ministry of Defence (MOD) under lease from BAE Systems. This arrangement ended at the end of March 2020, and the ship was returned to the company. The MOD has no plans for a further role for HMS CLYDE.