Why wouldn't they all pay the £345 they or any other government are likely to reduce them all to the lower amount! It might make sense to leave those with the cheaper ved on that until the next renewal but I can't see why they wouldn't change it thenI can see all 4250kg (if the weight goes up from 3.5 to 4.25) and under paying the £345 or whatever that goes up to, they have a 22 billion black hole to fill