Is the tractor with a MAM of less than 3,500 kg travelling correctly on the hard shoulder?

A)Yes, but only in the event of a breakdown.
B)No, because it must travel in the right-hand lane.
C)Yes.Correct
The driver of any animal-drawn vehicle, special vehicle with an authorised maximum weight not exceeding 3,500 kilograms, cycle, moped, cyclist-escort vehicle, or vehicle for persons with reduced mobility, where no road or part of a road specially designated for them exists, shall travel along the hard shoulder on their right, if it is passable and sufficient for each of them, and if it is not, shall use the minimum necessary part of the carriageway.