Congestion in London is hardly a new thing, it’s the reason the original Underground routes were built, why cities were rebuilt with wider roads over the centuries, etc.
What we have in London is a mixing of two different political bandwagons, congestion (the number of vehicles/pedestrians/etc) and pollution (emissions from vehicles/homes/etc).
The solution to congestion is simply not to live & work so close together, COVID is providing an extra incentive with this, contraception is another solution.
The solution with pollution is the EV, cleaner fuels in homes, banning BBQs etc.
Legislation & taxation are merely extra tools to nudge people into making better decisions.