Cameron promises Britons vote on EU exit

LONDON (Reuters) - Prime Minister David Cameron promised Britons a vote on quitting the European Union, rattling London's biggest allies and some investors by raising the prospect of uncertainty and upheaval. Cameron announced on Wednesday that the referendum would be held by the end of 2017 - provided he wins a second term - and said that while Britain did not want to retreat from the world, public disillusionment with the bloc was at "an all-time high". "It is time for the British people to have their say. ...