According to a study conducted in 1000 cities in 50 countries based on data from connected vehicles and phones. Not disagreeing with the primace but I expect there are plenty of other more “congested” cities, visit Manila or Jakarta for example. The UK should however definitely do more to fund its public infrastructure.
I’ll just leave this: https://youtu.be/Nv_LN2Nq2Es?si=UD6jlVA-lAqB6q1a