@OzPeter said:

The total distance is shown in Miles .. but does not have any indicator as to what the units of length are. The incremental distance around the virtual lap is shown in by the arrow shaped icons along with a numerical value of 50M, 100M, 150M etc. So not only do they show distance in two different unit systems and only show the units for one of them, they even have the unit symbol wrong - it should be m not M

 Are you sure those weren't metric miles (1 mile = 1000 metres)