Re: Fag packet calculation time...
"Average UK Mileage = 7,900 miles per year."
Ok, the average UK driver doesn't drive much.
You have a problematic assumption here. Distribution matters. You can't estimate the peak charging requirements by averaging across all vehicles, any more than you can estimate the speed of driving to work and back by dividing the trip distance by 24hours, particularly when you average in the driving distance of those who do not commute.
You have to provide distribution paths for each vehicle station that will handle the peak requirement for that vehicle. That's a lot of copper that will be tempting metal thieves.