It is an odd sort of invasion. In the past month there has been a quiet stampede of impeccably dressed alpha men and women to these shores. Over they have flocked, from the east coast of America to the West End of London, to Mayfair, to the Square Mile.

They are the K Street lobbyists — America’s finest political guns for hire. And now they are gunning for business in Britain.

Rarely in the history of capitalism has anyone been handed an opportunity like it. Almost overnight, the entire gamut of regulations once handled on Britain’s behalf by Brussels will be transplanted back to London. Trade policy, product markets, financial standards, agricultural subsidies. Tedious as such matters sound, swaying the rules in your company’s favour