Good point - the driver should get the mileage (otherwise everyone in the car would tie break for the prize) however in the case of a pool where one person had completed a longer journey than the eventual driver I can see we will need a specific ruling.

It's going to be impossible to determine who was driving when, so I propose that everyone in a car can claim the full mileage, however if a group from the same vehicle win (because they will have all travelled the same distance) then they must nominate the final winner from their group. This would most likely be whoever did most of the driving.

We really should have dropped this particular competition

Rob