I joined the RAF in 1962 as a pilot, the last year that any National Servicemen left the service. Quite alot of our instructors had been NS pilots and I seem to remember that they had to agree to three years rather than two if they wnted pilot training.
The speed of training still existed at that time, 4 months at South Cerney, one year at Syerston, six months on the Vampire at Linton on Ouse followed by four months at the OCU on Vulcans (Finningley) and off to IX Squadron. No leave between courses so the total was 25 months from joining to being on a squadron.
ACW