OK, I started this. I've read through all the reponses and I have to say they seem to have ranged far and wide with a few 'side issues' being discussed.
Now, my intention at the outset was to 'provoke' just this sort of discussion - and I quite deliberately chose ANPR as the 'trigger' rathern than scameras to try and avoid excessive emotionalism. The underlying factors I was trying to bring out were: "What other options are there to address issues surrounding road safety".
It would seem I've managed to achieve that to some extent. As far as I can see, there seems to be
some consensus regarding applying VED as an element in the price of fuel, rather than todays system. At least that gets us away from being able to evade it. It also addresses some of the other issues surrounding 'pay per mile' in effect, since, if you drive (heaven forbid) a Smart car, you will pay significantly less per mile than if you take the Roller out for a spin. Also, if you use the roads for (say) 30,000 mileas a year (as I did in my last job) then you will pay more than the old dear who does 3,000 a year pottering to the shops. EDIT: (unless of course she's in the Roller

)
Seems fair to me. I would guess that basingwerk has an element of choice in where he chooses to live - so can't really complain too much, though I do accept he will pay more (as I would).
As for the insurance element being added fuel, I'm not so sure. We currently (as I understand things) effectively have this through the MIB fund (which baled me out once when shunted in the rear by a driver who had insurance but refused to notify his insurer, then left the country at which point his insurer refused point blank to even consider a claim on his policy!). Therefore, the cost of this fund is added to everyone's insurance. I don't know what the figures are, but I suspect it will be percentage based. Could we
really trust the insurance companies to remove that surcharge element if it were applied centrally through fuel prices???
As for ANPR. I have to say I am not an out and out advocate of technology and firmly believe there is nothing better than the BiBs for sorting out these types of problem. However, if used as an AID then it can be useful. Reliance (total and blind as per the scameras) is not the way to go. The idea of all patrol cars having it installed (as was mooted earlier) seems reasonable since it is then acting as an aid (or 'trigger') to the trafpol to draw his attention to something which may (or may not) be 'hookey'.
Just a few thoughts. I will now don my fully protective suit and duck!
Cheers, Chris B