Unfortunately not everyone passes first time. Given that the National Pass rate is 56% and the Brecon pass rate average is 64% anyone who says they have a 100% is lying!
For those who pass first time - Great! but for those who don't it can be a crushing experience.
As such I do a wash-up a few days later. In this free session we meet for coffee, go over what went wrong, look at the test fail sheet, review the feedback, maybe I'll even drive to the area and see what went wrong and demonstrate how to do it correctly.