They won’t ban cars from London. The congestion charge, a toll for driving in central London, raises too much money.
Likewise for air transport Have you looked at US to UK air tickets? As one of his last actions as chancellor of the exchequer, Brown slapped an extra 100 pounds fee on longhaul flights landing in England. Of the $300 tax on a US-UK ticket, England extracts $250 to the US’s $50. Brown also wanted to tax aviation fuel only to find that such an action was banned under a 50 year-old treaty.
There are a lot of pedestrian only centers of cities in Europe, primarily because the roads are too small, and no matter how old, decrepit and un-insulated the buildings maybe, the last thing they would do is modernise, and redesign: Coventry and Oxford in England, Seville in Spain, Maasticht, etc.

outstanding info!