Not complicated at all
On your VED renewal form there will be a box for current milage and another for estimated milage next year, 10,000 miles will cost you £300.
On your next renewal you put milage and you oat more or less according to your estimate, it canāt get much simpler
They already have milage on your MOT so the scope for fraud is very small, the real fraud will still be done by those who donāt Tax, Insure or MOT their cars
This is not going to encourage anyone to change to EV, those that drive EV a lot abroad are going to be paying twice, but if you drive 3000 miles abroad it would be £90, one tank of petrol on a large car.