On several occasions during the test the examiner will ask you to pull up on the side of the road. You will need to take into account road markings and surrounding hazards. Generally, this is one of those things that you either get right or you don't. So pulling up within 10 metres of a junction or on zigzag lines, the brow of a hill or on a sharp bend will result in a serious fault and therefore a fail. The examiner won't want you stopping on single or double yellow lines particularly if there is a better alternative, but occasionally, for expedience, they may say "you can ignore the double yellow lines on this occasion" - in which case it is okay.