speak to the examiner BEFORE you go out on the test - sometimes they can be reasonable.
an example was the question - if I can overtake a vehicle but need to briefly break the speed limit to do so, is that acceptable.
the answer from the examiner : If I see that, then I will be observing something else at the time (indicating that he wouldnt "notice" the indiscretion)
make sure you drop to the speed limit after the manouver though.,