I just tried a sample theory test and answered 38 out of 50 questions correctly - or 76 per cent. The pass mark is actually 86 per cent, so if I were taking it again I'd need to do some serious swotting. But I suppose for a first try, having never done a theory test before, that's not too embarrassing.
Some of the questions seem to have little to do with driving ability though. Like "How can you avoid wasting fuel?" or "How can you stop your car radio being stolen?" or "Where should you not park?" But you still have to know the answers.
You also have to be familiar with the Highway Code, which runs to 162 pages. I know it's been updated numerous times, to cover things like giving way to pedestrians and allowing for cyclists, so there'd be more swotting required.
As for the practical side, my ability to drive a car might not be what it used to be. I passed my driving test first time but no doubt my standards have slipped a bit since then. There must be a natural tendency to become a bit careless over the years and not drive quite as safely. Dodging traffic lights, speeding, driving too close to another vehicle, risky overtaking. I have to say I'm guilty of all those. So whether I could still satisfy a driving examiner is debatable.
Still, as yet I've never had a serious accident, so I must be doing something right.
PS: I've just discovered there are two parts to the theory test - multiple choice and hazard perception. If you fail one part that's a total fail and you have retake the whole theory test.

