London mayor Sadiq Khan, whose official day job is running the capital, is in New York this week, where he has denounced Donald Trump and urged Americans to vote for Kamala Harris. Trump would set the wrong tone for the rest of the world, Khan declared. ‘What I’d say in a respectful way to Americans is: I don’t think you realise that the rest of the world is watching because we’ve got skin in the game,’ he said.