European Union officials have called for the UK to start the exit process as quickly as possible after Britons voted to leave the 28-member bloc, prompting the resignation of David Cameron, the prime minister, and dealing the biggest blow to European efforts at greater unity since World War II. The outcome of Thursday's EU referendum - a 52 to 48 split in favour of Britain's exit - caused financial markets to fall sharply and brought the British pound down to a 31-year low, its biggest fall in history. There are now fears the vote could set off a chain reaction of further breakaway bids by other EU members battling hostility to Brussels. There are also fears the outcome could lead to the...
