Kemble,
whist the aircrew were always trained not so with many of us groundcrew. 'learning on the job' was the RAF way of doing things back then. As for a 'ready supply of spares', this only lasted until the 'hangar queen' had been gutted of anything useful. As is usual with any RAF a/c the spares were anything but plentiful. The a/c was a nightmare to keep serviceable for all the trades and on 92 (F2A) along with jet pipe fires and other problems AC failures were common. Just my opinion of course but I did work on them at MSG and Leconfield.
I understand that EE regarded the RAF groundcrew establishment as inadequate for the task.