al78 said:
Or maybe it will discourage the current practice of sending food on a 600 mile round trip only to be sold in a shop two miles from the farm it was originally produced.
Not just food.
An article I read last year - I'll credit it if I remember where - suggested that the average distance multiplier from point of import, manufacture or production, was between 10 and 20.
With much of that being by road, in the most structurally damaging vehicles, not only would enforced rationalisation reduce fuel use, it would also save a fortune in road maintenance!
If the multiplier is even as low as 5 it would be quite possile for a reduction in unnecessary mileage, brought on by increasing fuel costs, to make the price of goods at the point of sale actually drop.