Britain votes later (Thursday - polls open at 7am BST) in a general election too close to call.
David Cameron's Conservatives and the opposition Labour Party led by Ed Miliband have remained neck and neck in most polls for weeks.
If there is another hung parliament both men may have a chance to try and put together a coalition government.
Alternatively, one of the parties may attempt to govern in minority - raising the chances of another election this year.
All eyes remain on the Scottish Nationalists, the SNP, who are expected to win a swathe of Westminster seats.
UK correspondent Olly Barratt says it's on a knife edge.
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UK correspondent Olly Barratt says Britain's economy could be set to suffer.
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UK correspondent Olly Barratt says the election has been a boost to those who want to see an Independent Scotland.
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