PureJade makes a very valid point.
Outwith NATS, many units got dispensations for ATCOs to be appointed OJTIs on the basis of "Grandfather Rights".
This is all very well, but the majority of such ATCOs have not done refresher courses because their employers manage to evade their responsibilities and trainees are coming out of the colleges much more informed than the "OJTIs" themselves.
Perhaps the CAA should get off their collective arses and insist on anyone wanting to be an OJTI attending an approved course, Grandfather rights are of no use to anyone, least of all the trainee.