Word has it that they actually monitor your whereabouts including what road you are on/have been on. MTO receives a list each month of those naughty boys and girls exceeding authorised distance, straying off track and speed limit. Resulting in a meeting positive cap, negative tea, negative biscuits.
Apparently a former WO at a particular green and pointy training establishment instigated the system in his fleet. Deemed so successful in the higher echelons it was adopted across the rest of the Service and by the other two as well.
Struggle