I think Norfolkline could give the Navy a run for their money at the moment! :lol:
Maybe a return of the Armed Merchant Cruiser concept? There's plenty of demand for good quality tonnage, ships could be chartered to civilian operators when not needed for RN operations. You would need a bit of advance warning to bring them in, bolt the weapons on and swap the crews over but they'd be earning money for the rest of the time, rather than sitting in harbour unused.