You cannot legislate for diver skill and attitude. Follow all the SALT or whatever you like but you cannot know without going diving.

100% of OW/AOW divers we get want to do Sports Diver. We don’t really get rescue divers turning up, we get more DMs, but not many of those.

Re training vs diving, for the last year I have not done any proper diving but at least we concentrated on getting people to Sports Diver so can fill more interesting trips next year.

I am not sure training OD is worthwhile. With AOW and especially Deep, you get half an excuse for why you let them jump in on a 30m wreck in the Channel. With OD it takes a very long time before you can take them where you want to dive yourself.