I passed mine on a BSA C15. CCH 552B. in 1975.
Back then I never wanted a car, in fact had vowed never to own one. Had every intention of going to USA and going feral. Personal circumstances suddenly changed beyond all expectations and by the following year I had to become totally focused and more disciplined and thought I'd better pass my car test, although I couldn't afford any formal lessons. I borrowed someone else's car for the test and passed first time (I had learned how to physically drive a four wheeler at the age of 14, but off road). In 1977 I needed a car to move my kit about and the next bike, an A7SS, finally had to go when it seized a big end bearing and "stuck a leg out" through the bottom of the crankcase on the M1.
After owning a whole variety of cars, some good, some not so good I have gravitated back to two wheels, although I never left; I've seldom been without a bike somewhere about the place. I still own a couple of small cars (actually four cars in total) but other family members now use the better car much more than I do. I commute to work in an old banger and love it. Now planning to retire at the end of this year.
Strange how things turn out, all in all.
Built like a gun... could go BANG!