During my time at RAF Basic Flying Training School, BFTS, it was all-through jet training. We flew the Jet Provost Mk3, then the pressurised Mk5 for the second phase. No Chipmunk, Bulldog or whatever for direct entrants like us, with no University Air Squadron background.
Fast Jet students then continued onto Valley, to fly either the Gnat or the Hunter.
The Tucano (turbo-prop) then came into service in the early 1990s as a cheaper alternative to the jet trainers.