That distinctive mane of hair. Known to all by their first names alone. A poor grasp of detail. On paper, there are some similarities between Boris Johnson and Donald Trump but how alike are these two politicians?

Ken Clarke, the former Conservative chancellor and party heavyweight, reckons they are. “[Johnson] is a much nicer version of Donald Trump,” Mr Clarke said. “But the campaign [to leave the EU] is remarkably similar [to Mr Trump’s] in my opinion and about as relevant to the real problems the public face.”

Before we become too carried away by the rise of populist politicians, it is worth noting that Mr Johnson is really not like Mr Trump. For one thing, the US businessman stands for policy ideas such as a ban on Muslims, building a wall at the border with Mexico and bombing “the shit” out of Isis.