Considering our city has just binned off its plans for a clean air zone because people moaned, I'm not sure changing a 1.2l petrol to an EV is going to make much difference compared to the HGVs, vans, buses, taxis etc belching out diesel fumes.
I'd like a new car, as we've had this one about 7 years, and the economics of an EV currently works, with tax breaks and ability to charge cheaply overnight. It's likely the tax benefits will start to be eroded from 2025, especially if the ban on new ICE cars remains, but the cost of electric is the key one. Haven't seen what the new price cap will mean for unit prices, as they only quote the average annual cost, but if it is 80% higher than current, that will mean about 50p per kWh. As long as the overnight tariffs remain, that's fine, but if they were to go as well, and I can't see how you can charge 7.5p if break even is not much less than 50p, then the economics become seriously stretched, taking into account the additional purchase cost, especially compared to a nearly new ICE (and I'm expecting to see a lot of them hit the market soon when people realise they can no longer afford their car lease)