Advice:
Take it easy, and concentrate on giving the examiner a comfortable rid. An examiner who isn’t shaken up by bouncing around will be a nicer examiner.
Take your exercises in the test centre (reversing and controlled stop) nice and easy. At my local centre they are done before getting out on the road, and it’s an opportunity to get nerves sorted before you get out with the other traffic.
DO NOT BE AFRAID to hold people up. You HAVE to drive right to pass. If people behind you are upset by you taking your time, then stuff them, they’re not on a test.
Don’t try and rush the gearbox or any roundabouts. Be polite, and try and let people out in front of you if it is sensible to do so, but don’t flash them out.
and above all:
Don’t panic!