Across the Atlantic, Donald Trump has inexplicably veered between describing London as a city moving towards sharia law, and a place with hospitals like “warzones” and areas where police don’t want to go. Here in Britain, Nigel Farage is dancing to his tune. Reform UK’s leader claimed last week that London was “in the grip of a crime wave”. Meanwhile, the party’s new candidate for mayor of London claimed that people pitied Londoners for living in a city that was “no longer safe”.