I have interpreted “decommissioned” to mean withdrawn from service.
In relation to the Royal Navy and Royal Fleet Auxiliary vessels that have been withdrawn from service in the last five years, I refer my right hon. Friend to the answer given by my hon. Friend the Minister for Defence Personnel, Reserves and Veterans (Mark Lancaster) on 20 March 2017, to Question number 68186 to the hon. Member for Westmorland and Lonsdale (Tim Farron).
The ships that are programmed to be withdrawn from service over the next five years are listed in the table below. It should be noted that the dates may move depending on operational needs at that time.
RFA GOLD ROVER, HMS SEVERN
HMS CLYDE, HMS MERSEY
In respect of submarines, I am withholding information on their programmed withdrawal from service dates as disclosure would, or would be likely to, prejudice the capability, effectiveness or security of the Armed Forces.