Given that 80% of the price of road fuel is tax, all this talk of increased vehicle taxes based on engine size is silly.
The tax on fuel is already a near "perfect" tax with every incentive to buy fuel-efficient cars:
If you drive a car that does 20mpg then you pay twice as much tax as you do for a car doing 40mpg.
If you drive everywhere, using your car when you could have walked or taken the bus, etc, then you pay more.
If anything, they should get rid of the "tax disc" and raise the equivalent sum from fuel tax - its fairer. I mean, if you have a car, but only use it when you REALLY need to, you are producing less pollution that if you drive 20,000 miles a year, so why have the fixed price tax on haivng a car? Put it all on fuel, makes far more sense. Also, its pretty hard to evade paying fuel taxes, so they could get rid of the whole bureaucracy and admin cost of chasing non-payers, sending out reminders, queueing in post offices for tax discs, etc, saving more money and effort.
Giles..