It'd probably scare most of you if you realised just how relaxed the MOT rules are. I mean you could drive out with a nice green ticket dispite having all 4 tyres on your car with only 1.6mm of tread left, only 1.5mm of brake pads left all round, brake discs that are corroded and pitted, top suspension bearings seized, engine badly leaking oil, oil level itself low, coolant low, need i go on? An MOT is just a minimum standard, and anyone that thinks a car that is just tested is good enough to run maintenance free for a whole year is sadly mistaken. Very few cars will go from MOT to MOT without having any work done, or requiring work done for the next MOT.
Oh and going by the op's mileage point, on friday I mot'd an 07 plate 530D with 121k on the clock - passed no problem, but an old man's corsa that was 9 years old with only 11k on the clock needed the sills welding, tyres that were badly cracked replaced, wishbone bushes etc. I'd rather have a high mileage new car than a low mileage old one.