Jaycool007:
Good luck with your training Davy boy. I still make a pigs ear reversing my little yellow Fiat Cinqucanto sometimes so god only knows how i manage to reverse a class 2 each day
coz if like me your in your truck more than your car 
Sniper said…
There is no time limit on the excercise.
I got a minor for taking ‘a bloody long time’.
Tips…
Drive forward until the trailer is dead straight behind you. Look at the mirror so you can see how much trailer is in each mirror. Now reverse in a straight line, and watch what you need to do with the wheel.
When I was learning I couldn’t reverse. On the day of the test it just happened to go right!!
If I have been on 13 metre trailers I certainly notice the difference when I have to reverse a 20 ft one. They do come round a bit quick!!!