Sorry for posting in the wrong forum, btw.
I managed to get a 135(ish) time because i figured it's around the end of lunchtime and not the end of school & work so the roads won't be too busy - less hazards and no kids running about.
Everyone i know has said similar things. Adjust mirrors so it's obvious when you're using them because you have to physically move to do so (within reason ofc), always checking your blind spots before/during/after manoeuvres, be friendly to the examiner, stay calm and dont panic so everything is fluid and smooth.
Thing is, all my mates who have failed in the past always seem to do so in situations they don't really have a lot of control over. I don't mind failing if it's my fault but not when some guy cuts me up and the examiner gets to his pedals a second before i do (which would obviously be the case as he's been driving at least 10 years...)