I passed my Moped, Motorcycle, LGV,(old HGV - a real b*stard of a test in a 10 ton truck at school chucking-out time) and Advanced Motorist tests all the first time of trying.
The 'standard' Car one, (which I always feel most comfortable with) - failed twice! (lol)
I had the same short-arsed git take me for my first two tests, (1st one I should have failed, granted) but the 2nd test was easily my best.
Got a different bloke on the 3rd, I made quite a few errors, (and thought I'd failed again) but he was happy to pass me. Just goes to show, you can never tell, so don't give up so easily!