In this brave new world of RAB one should ask the question of ownership ie whose asset register are the aircraft on.
Put it this way and you realise that the Royal Navy do not own their Harriers (they 'belong' to an RAF TLB (STC) who lets the Royal Navy paint the aircraft and fly them). The RN will continue not to 'own' the GR7/9s when 800 and 801 move to the midLANDs.
The same can be said for the RN's Seak King Mk 4s, Lynx Mk7s and Gazelle AH1s (only the FAA could count the drumstick as an attack helicopter!) that are 'owned' by the Army (LAND TLB).
Similarly the Army 'owns' the Pumas, Merlins and Chinooks that have Royal Air Force markings on them!
Isn't life simple nowadays? - Remember 'Purple is just a deeper
shade of Green'.