How?
Will it go on MOT? Will it go on some monthly reporting? There's currently no mechanism for collecting the info and billing. Unless the Chinese govt have done a deal with all their car data and Tesla etc agree to do the same - and then the payment will cost probably as much as they collect.
Just take the VAT off car charging points - oh wait that'll give people a socket option still to avoid VAT.
There is an argument that very heavier vehicles do more damage to the road - which means anything with a battery in is probably doing more damage than a petrol car.
Electric cars are typically heavier than petrol cars,
Let’s look at the Peugeot 208 as an example, a small hatchback which is available with either a petrol engine or as an electric car. If you go for the 1.2-litre petrol model, it tips the scales at 1,090kg. On the other hand, the all-electric e-208 with its 50kWh battery weighs in at 1,910kg, almost double the amount.