[Retlaw]

Originally Posted by steeljack

seem to remember there were also one or two "motorized' bicycles around in those days as well , not sure if they were 'production' models or something left over from the austerity days of WW2

There were two kinds of motorised bicycles just after WW2, one was built into the hub of the rear wheel the other was clamped over the rear wheel and had a spring loaded roller which engaged on the tyre.
Mate of mine in the fire service had one of those built into the rear hub, it was a right pig of a thing to maintain, mostly muck in the carb.

Retlaw.