An exit poll for the BBC, Sky and ITV Newsis projected onto Big Ben in London.Polls suggest Britain is heading for a hung Parliament with the Conservatives 21 short of a majority.
The counting process begins amidst reports of angry scenes at some polling stations where people were still queuing to vote past the 10pm deadline.
There were reports of queues in Sheffield, Leeds, Newcastle and other parts of the country.
Houghton and Sunderland South has won the race to become the first constituency to declare a result.
The constituency declared at 2252 BST. Labour’s Bridget Phillipson won the seat with 19,137 votes.
The first Northern Ireland results have been declared.In north Antrim, the DUP’s Ian Paisley Jnr polled 19,672 votes, winning the seat comfortably despite the contest from TUV leader Jim Allister.
Gordon and Sarah Brown arrived in a flurry of flashbulbs at the count in Kirkcaldy.His spokesman said Brown is "very concerned" about the reports of people being turned away from polling stations.
Conservative Party leader David Cameron enjoyed a drink in a pub on the way to the count in his Witney constituency,
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