Are you an electrical engineer or anything like that?
Do you fancy showing us how a smart meter can tell if an EV, a kettle, a heater, an oven or something else is plugged in and drawing power please.
Because as far as I know, that's not technically possible. I'm not an expert though, so of course I would not say I'm sure about that, and I'm happy to be shown otherwise. Since you are sure, could you share your professional expertise and background in this area please.
At the moment the way I see it is we have three options:
1) ANPR cameras - proven, existing, working technology, which is already in place in many of the places that would need it, and already have at least some of the background systems in place to run it.
2) GPS black box units in cars - proven, existing technology, which has been trialled but not in use anywhere nor with the background systems up and running at all
3) Additional charge for EV powering - effectively already done at commercial charge points which have 20% VAT rather than 5% VAT domestic fuel charge. Not shown to be technically possible to do for home charging, not done or trialled anywhere as far as I know.