In general if you're trying to drive through a major city you're probably doing it wrong. Cities are far too densely populated for inefficient motor vehicles to be the primary means of transportation. You need to be using the tube or a bus instead.
I drive through Barcelona in 10 minutes and it's a 5 million super dense city, no dramas.
But London has been taken over by the ecologist dictators who enjoy your pain ("bleeding heals") and that's why London is a city with no future.
And I say Barcelona but I could say Warsaw, Paris, Kiev, and so on.
London had very few roads already and the current major took care to close them one by one.
Also Barcelona has terrible air pollution.
Instead London decided to put bus lanes and bike lanes and wider sidewalks
Very ecological but fatal for the city, which has the worst commute speeds anywhere in Europe.
That's a competitive economy? Nope!!