I'm glad you agree (by omission) that EVs not paying tax is a subsidy that needs to be removed.
No. I've never disagreed that EVs may
eventually need to be taxed, if you go back 20 or so pages (man this discussion has gone on too long.) It's not an easy problem to solve though - probably requires road charging to be fair because there will be some who can charge on home electricity or from solar and pay much less tax than e.g. a levy on public charging. Road charging is very expensive to do, requiring either tamperproof metering on each car (you can't use MOT mileage because private mileage, other drivers, out of the country, etc. plus odometer tampering is trivial) or some kind of ANPR system (which inevitably would only capture some types of user, and is really expensive to do for e.g. rural countryside, so you have the side effect of people avoiding express routes to avoid tax; see also
M6 Toll.) That's why I think it might not even happen and instead the taxation just comes from somewhere else, like income tax or a higher VAT chargeable on new cars, but predicting the future on tax is even more nebulous than for the future of transport.
It's worth noting EV users do already pay some tax - 20% VAT is applied on public charging and 5% VAT on home electricity. This is of course less than fuel duty.
The problem is on one hand,
you argue EV's are too expensive and inconvenient for the general consumer and now you want to apply taxation to their usage to counter some of their benefits in terms of low cost of operation. The end goal is to electrify transport, to allow zero emissions driving. I'd be also opposed to a tax on hydrogen cars (even if I don't think they're feasible.) We should be promoting ZEV usage in the time when people are taking a risk on a newer technology, not discouraging their take up.