Nowadays, with mileages at every MOT being recorded centrally, available online to anyone, and the most recent mileages printed on test certificates, it is a lot harder for dishonest traders to clock cars arbitrarily. A sudden loss of 30, 40, 50 or 100,000 miles should be prettymuch impossible to hide. However, although clocking is now less blatant, it still happens, and thanks to the widespread advertising
