sophie: the way you are having your MOT done (garage, MOT centre, garage) COULD be an invitation to be ripped-off. I take mine directly to an MOT centre and , if there were to be a fail- which there hasn't , yet - I would have a copy of the fail points and would be able to phone a few garages to get quotes for the work. At present, you seem to be giving your garage a "blank cheque" to do whatever work THEY want to do. This may not help this time, but think about this next time.