"and was never stopped by the cops - wot was the legals back then?"
I suspect you had a lucky charm secreted somewhere.
It is certainly a world wide requirement in the parts of the world that claims to be "civilised". They have police forces that need paying.
I had a nice occurrence on my first motorcycle. I had not passed the driving test), which meant I could not take a pillion passenger unless the passenger was a licence holder..
I was passing through a small Lancashire town when a lunatic on a motorcycle came hurtling past, waving me to pull in to the side of the road.
I thought he wanted help or something similar. It turned out he was a part-time special constable.
He started lecturing me about the law and the possible outcome of my actions and I must give him my name and address so that I could be persecuted. I had a pillion passenger (my future wife).
He took out his official note book and wrote down my answers to all his questions. After he had put it back into his pocket he ordered my girl friend off the bike and said she could not ride.
I said to her" Now show him your licence." (she had a motor cycle licence because she had one of those peculiar bolt-on "mini-motors" as they were called.)
She showed him her licence and he just turned and shot off with a very red face and a bowed head.