I'm sure that's the ultimate goal, just wonder how they'll put together a system that can't be evaded ?
GPS tracking ? so easy to block weak signals in the ghz range, bit of tinfoil over the receiver would do it.
Cameras on gantry ANPR system ? more difficult to evade for sure.
MOT mileage based ? There's always going to be a way to 'adjust' mileage, especially if it saves you thousands.
Tax the actual electricity you're putting in your vehicle battery ? Not sure how that can ever work, tons of ways to dodge it.
I think just hitting us with an eye watering VED of a grand or more yearly is the simplest and hardest to evade solution for them.
Although I have heard that the police no longer pursue VED dodgers, not that I've tested this