How can there be more bankers earning in excess of £800,000 in Britain than in the entire EU?
Given that Britain is in the EU this cannot actually be possible.
But we all know what she means: and the answer is that the wholesale financial markets are overwhelmingly in London. Thus the concentration of highly paid bankers there.
Just as the national media is dominated by London: therefore there are more highly paid media types in London than there are in the rest of the UK. And the same is true of such things as pottery: there’re more in Stoke on Trent (yes, even today) than there are anywhere else.
It’s simply because wholesale finance tends to cluster, just like so many other industries do (chlorine chemistry on the Tyne, fluorine chemistry in Liverpool etc ad infinitum).