We've been there, many times.
A 5 litre 'weekend car' that does 1000 miles a year is much less harmful to the environment than a modern 2 litre car doing 12,000 miles a year. So which should be hit with the higher tax?
I have a 4.3 V8 which does about 6000 miles a year
My wife has a 1.6 Clio which has averaged under 900 mile pa over the last two years.
We walk everywhere and/or use public transport.
We are the first people we know to completely trash a Bugaboo baby buggy - in 3.5 years it probably did more miles than the Clio!
Meanwhile my neighbours in their "green" woodburners and hybrids are racking up huge miles. Need a paper. Get in the car. Need some milk. Car. Johnny needs to go to school. Car. etc etc etc
I am the greenest AMG owner in West London and a hell of a lot greener that most of my wood burning neighbours