I recently visited RAF Linton on Ouse. Linton has been an RAF airfield since before WW2 and has been training RAF and Royal Navy fast jet pilots since the 1950's. It is due to close shortly and I went to see the last course of Naval Fast Jet pilots to be hosted by Linton.
I visited the Defence Helicopter Flying School (DHFS) run by Ascent Flight Training, at Shawbury to view the new training for ab initio military helicopter pilots. This is Tri service - they train Royal Navy, Army and RAF pilots.