Probably better to remove car tax and put that on fuel tax instead.
if they did that how on earth do you make it fair,
If its cheap enough for the hauliers not to complain, then Joe bloggs would pay peanuts towards road up keep
keep, but if its enough to cover joes current road tax then the hauliers will go nuts and every thing, as in all goods and services would rise to cover the increase in fuel, most noticeably on perishable goods and low value bulky items, nurf people going on holiday around, and to the UK, possibly throw the economy into reverse