Maybe I've just been lucky! Back in the 71s when I first passed my test, i was advised not to use my wing-mirrors as you had to be able to drive with just the interior mirror, and I still see lots of drivers doing that. When I later upgraded my automatic license to manuel (I only had access to an automatic in the 70s) I was advised to use everything available, and then, before I could drive for Royal Mail, I had a bit more training and testing.