US President Donald Trump says UK Prime Minister Andy Burnham must open up the North Sea to drilling to avoid the nation going bankrupt. “I have a very good relationship with your new prime minister [Andy Burnham], who’s very good,” Mr Trump said. “He’s very liberal, very liberal, but I hear he’s going to open up North Sea oil. “If he does that, you’re going to have a rich country; if he doesn’t, you’re going to have a bankrupt country.”