By Alastair Macdonald BRUSSELS (Reuters) - Britain need not send a formal letter to the European Union to trigger a two-year countdown to its exit from the bloc, EU officials said, implying British Prime Minister David Cameron could start the process when he speaks at a summit on Tuesday. "'Triggering' ... could either be a letter to the president of the European Council or an official statement at a meeting of the European Council duly noted in the official records of the meeting," a spokesman for the council of EU leaders said.
Boris Johnson, one of the leaders of the successful "Leave" campaign in Britain's European Union membership referendum, has won the backing of a key colleague to replace David Cameron as prime minister, a newspaper reported. Justice minister Michael Gove called Johnson by telephone on Saturday to say he would back him for the leadership of the ruling Conservative Party, the Sunday Times said. Cameron announced on Friday that he would step down as prime minister by October after voters in the referendum took the historic decision to back the "Leave" campaign which was led by Johnson and Gove.