Nigel Farage has said he would be willing to help Peter Mandelson negotiate with the Trump administration, after the Labour grandee was confirmed as Westminster’s new ambassador to the US. Lord Mandelson has indicated he believes the Reform UK leader, a friend of Donald Trump, could serve as a link between the UK and the Republican president-elect. But Downing Street would not be drawn on whether Keir Starmer would like the political veteran to work with Farage, saying when asked only that the prime minister had “already started to begin to build a relationship” with Trump. Farage has previously offered