Just to chip in, 20 V-bomber sqns would have about 2000 aircrew not including station, groups and command staffs. I would guess the other flying commands and air forces would have had similar numbers.
In 1961, not counting the small number of aircrew at Cranwell, the initial aircrew officer training intake was around 100 per month of which around 80 were pilots.
Given chop rates and deaths and assuming aircrew on 8 year commissions (some were on 5, others leaving at 12, 16 and 20) there would have been about 6,000 - 7,000 into productive service at that time. Aircrew above JOs were either wartime assimilated aircrew or Cranwell output.
When a Nav course graduated in 1991 they were told the RAF aircrew requirement was just 1,000.