Millions of people across the UK begin casting their _A_ in the general election that will decide the next government.
But with the election too close to call many _B_ have suggested that there could be a hung parliament - in which no party wins an outright majority.
Due to the structure of the British voting system, one party normally wins a _C_ of seats, even though there are three national parties.
The number of Britons showing an interest in voting _D_ after the country's first ever series of live televised _E_ between the leaders. More than 44 million people are registered to vote in the election.
The first results from constituencies are expected at around 2300 BST.
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