16B,
I thought the Harriers were part of "Joint Force Harrier" not the "RAF Harrier Force", much like JHC is "Joint Helicopter Command". I presume this means that the JHF and JHC will deploy under command of the Joint Commander surely?
My understanding from mates currently serving is that COTT/WITT can be commanded by the RN as well as RAF (best man for job).