My 2 cents:
All members of all forces have to do their jobs to win the war. From the lowliest barrier technician on the gate of the training school to the pilot of the super whizz-bang FGR-99.
Aircraft don't occupy land, boots do. Wearers of said boots get killed without air ops. If it's a long way away, we need the Navy to get there in sufficient numbers to do the job, see Falklands War.
Col Collins has had an opinion. Maybe - just maybe - an idea would be to put all the killers together (Army Teeth arms, RAF Strike, Navy Subs etc) in one Command, then all the support Arms in one Command. Why do we have RAF TCOs, Army Signals people, Navy Signals people all doing the same job, but different training and career paths?
I'm not saying phase out or merge any of the services, but why not command them in a joined up way? Why do the Army and RN have an air arms at all, when we have an entire service devoted to the air? Why not just post the relevant bits of an enlarged Air Force to the Army and Navy. Same with RAF Regt. What do they do the Army does not? Why does the RLC have any maritime trades/vessels? There's the whole f***ing Navy 20 miles away. Why do we need RAF and Navy PTIs when the Army has a whole Corps of them?
Them-n-us-itis helps noone.