only thing that could be useful(at least to my mind)would be a realistic breakdown of the figures but that can only happen if the mot system itself at the point we log such items is improved if its the ministry data youre using.as a for instance our perennial friend the ford ka tho its main fail is rot many will come up as seatbelt/suspension defects due to the areas said rot is in,honda could show up as headlamp defects even tho its cos the leccy lamp adjusters are pretty common-you get the idea.