A lot of V Bomber training was done on the Hastings. The Dominies were based at Stradishall in the sixties. Another option is a Valetta which I thing at least one did have College of Air Warfare on it. I think said College may have been at Manby in Lincs.
Nav Trainers were:
Valetta
Varsity
Dominie
Bomb aimers (& V Bomber Navs?) Hastings.
History of the RAF Vol 3 has a Dominie in 1968 I think.
Dominies nowadays are mainly Black with a White roof. ...and less windows!