Correct

An MOT is only "valid" at the time it was tested and should not be used by a potential buyer of a vehicle as "proof of its roadworthyness".

VOSA will not investigate an MOT appeal after the vehicle has covered more than a 100 mile form the time of test or 1 month since test (whichever is sooner)

The only exception is an appeal regarding corrosion - this will be investigated upto 3 months after time of test.