Having been part of a Purple Sqn, it was clear that the RAF and the RN usually have few difficulties getting on with the job and working together. It would seem logical for the Navy to provide expertise amongst the mission crew. However, the RN have limited numbers of multi engined pilots, and for any that moved to P1/8, it would be the only option in that career stream for them and therefore career limiting and unlikely to happen. So RAF to operate it for me, with RN helping if they can!
The Army though.....they always wanted to maintain their own chain of command, systems and structures - less working with, more working alongside!!! Any savings from them maintaining RAF/RN vehicles would soon evaporate as they posted in their own paymasters, RSMs, Adjutants etc!!!!