My instructors course inc a day of pre assessment.
The trainers on my course we great
I think that is the right way to go.
Trainers need to be sure each potential instructor has the basic off pat.
There are some dame fine instructors out here, there is also a fair few that I would not let run a bath let alone a Powerboat Course.
This is also true of SRC instructors, I have to deal with these people on an almost daily basis and have done for a number of years now.
I am shocked by the questions they ask me and think "OMG this person is asking me this and then teaching the public"
Some of these people have no basic understanding of radio and the rules at all yet they get through an assessors course.
There is a failing somewhere in the chain IMHO.