Britain's Prime Minister David Cameron and his wife Samantha wave as they return to Number 10 Downing Street after meeting with Queen Elizabeth at Buckingham Palace in London, Britain May 8, 2015. Prime Minister David Cameron won a stunning election victory in Britain, overturning poll predictions that the vote would be the closest in decades to sweep easily into office for another five years, with his Labour opponents in tatters.   REUTERS/Stefan Wermuth
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