There is a central question bank that national CAA`s can take there pick of questions from.I have also been throu the Bristol feedback but i did my exams in Finnland and there questions were straight forward and without "traps".Also in met. threre were almost no questions about what the weather would b at this time of the day in south east asia etc.
Best thing would b if u could get a look at the UK questions and get a feel about what they consider most important(and that they have most questions about).
Hope this helps u a bit. Good luck on ur exams