Prime Minister David Cameron is to step down by October after the UK voted to leave the European Union.
The verdict, which triggered a freefall of the British pound and turmoil on world markets, is a shocking turnaround after most polls had suggested Britons wanted to stay in the EU.
The latest polls showed the "Leave" camp was tied with the "Remain" camp in the EU referendum to determine whether or not Britain should stay in the 28-member bloc.
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