London is the richest city in Europe. Real output per person is central London is nearly four times the average in the European Union, and nearly twice that Europe’s other large, rich metropolitan areas, such as Amsterdam and Paris. Strikingly, London is more than twice as rich as the next richest region within Britain. However one slices it, the city is an extraordinary economic outlier.
That is from the forthcoming Work, Power and Status in the Twenty-First Century, by the always worth reading Ryan Avent.