I don't see what the big problem is here, if he has to move out of East London to keep the car - he has the money to do so, another ULEZ compliant (and more economical to run) car to drive to/from work in London and only uses the restored Vauxhall to drive to/from the coast. (he doesn't even have to move that far, just over the border to South Essex)
https://www.essexlive.news/news/essex-news/redbridge-petrolhead-1996-vauxhall-calibra-8439434
Of course he could give his fückin brain a chance and just pay the fee on the very rare occasions when he uses his pride and joy and stop being such kiddy - is he out of nappies yet?
When I lived there in the 1970s the air was barely breathable and from what I can see from the AQ monitoring stations, nothing much has changed since then!
I don't know what tossers like him would have the London administration do - just leave things as they are and kill 1000s of Londoners every year? The freedom to drive polluting vehicles is worth more than London kid's long term health, is that it?
Perhaps he'd like to F-off to Rwanda or somewhere?
In a determined effort to reduce pollution, the govt of Luxembourg (where I now live) made all public transport (trains, trams and buses) in the entire country free of charge. That's a bit outside the London Mayor's remit but I admire what he is trying to do!