Passed on second go. I failed the first time for going the wrong way round a tree....
The second time I had the famed 'examiner from hell' (every centre has one). Went the other way round the same tree, and was told I had failed again! I then looked in my mirror, signalled, and pulled into a parking place... and argued with the examiner about which way I was supposed to go round said tree. He agreed that the 'right thing' was ambiguous in that context, we carried on the test, and I passed!
Apparently the best place to do the test used to be Lampeter (Ceredigion) - no roundabouts, no traffic lights, but you could be stuck in sheep for an hour on market day... When I lived near there in the early 1980s I read a report in the local paper about a man who passed his test there in a steam car (they had to bring in a special examiner). The car caught fire in the middle of the test

but the driver extinguished the fire and completed the test, which he passed. The examiner told the reporter that catching fire was a regular event with that make of steam car, but that the candidate had dealt with the problem in a safe manner....!
I passed on my 3rd time though failing the others was not strictly my fault; the first time I had a racer come at me at 70mph while doing my 3-point turn and the next when someone decided to ignore all reason and race around a roundabout too damn fast and had to put on their brakes, and I get penalised for their bad driving???!