I passed at my second attempt, 27 years ago.(four weeks and no lessons after my first attempt)
The examiner said he could not understand how I had managed to fail the first time !
i had 6 goes...i think...discovered i needed glasses on the 3rd to correct a vision imbalance, which affected my 3d vision
i failed generally on things that were fair enough...except for twice when i i could have thumped the examiner as i felt he was being ridiculously unfair an petty..but hey ho