BKS, Northeast, British Air Services and BA viscounts all used LBA for training through the 1960s and 70s. Through those years there were a number of 'based' training captains who would use LBA and sometimes MME when an aircraft was available in between the schedules.
There was a limited amount of British Midland training with both the viscounts and DC9s.
As for the RAF, the Hastings based at Lindholme....when it was an airfield and area radar unit [!], were frequent visitors for practice half-mile SRAs....those were the fun days!