Wouldn't worry too much about not passing 1st, 2nd or 3rd time really lads, it doesn't mean you're not good enough really cause the simplest of mistakes can **** you up big time, i think most drivers who have passed there tests make mistakes that could be considered as a serious error on the test in everyday driving.
My driving test was ridiculous, i'd bought myself a car so i decided to use that for my test, usually you just have the person marking you and off you pop, i had the guy marking me like usual but unluckily for me i had another passenger, i had the guy marking me for the test and a guy marking him for doing his job properly so i knew if i made a mistake then i was ****ed, i passed first time with 2 minors (checking passenger side mirrors when pulling away from a standstill :/). Good job i'm a top jock.