Any new British prime minister will still face the problem of what to do about the Irish border when Britain leaves the European Union, the EU’s Brexit negotiator Michel Barnier said on Friday. Managing the sensitive Irish border and designing an emergency “backstop” solution to prevent the return of extensive controls after Brexit has proven the most contentious element of divorce negotiations between London and the EU. British Prime Minister Theresa May stepped down as leader of her ruling Conservatives on Friday, officially triggering a contest to replace her that could see her party embrace a tougher stance on Brexit.
