The new leader of the Liberal Democrats is set to be announced, following a ballot of the party's 73,000 members.
The count begins at 0900 GMT with Lord Dholakia, the Lib Dems' deputy leader in the Lords, due to declare the winner shortly after 1500 GMT.
Sir Menzies Campbell, Simon Hughes and Chris Huhne all insist they can win following a month of campaigning.
The winner's first job will be to open the party's spring conference which begins in Harrogate on Friday.
Last ditch wooing
As voting closed on Tuesday, bookmakers were putting Sir Menzies a fraction ahead of Mr Huhne, with Mr Hughes trailing some way behind in the odds.
In a last ditch attempt to sway undecided Lib Dem voters, the three candidates appeared together on BBC Two's Daily Politics show.
Mr Huhne, 51, said his plans to cut income tax for the lowest earners - which would cost Ј21bn - could partially be offset by increasing "green" taxes.
Sir Menzies, 64, called for a written constitution for the UK and stressed his "experience" and "judgement".
And Mr Hughes, 54, reiterated his demand for a timetable for British troops to withdraw from Iraq.
Controversy
Lib Dem officials will be hoping a new leader and a spring conference will herald a new start for the party, which has been reeling from months of bad headlines.
The contest began on 7 January when Charles Kennedy resigned after admitting he had a drink problem.
Sir Menzies, the party's foreign affairs spokesman, took over the reins as acting deputy leader and threw his hat into the ring for the top job.
But any hopes that his candidacy would be unopposed were dashed when the party's home affairs spokesman Mark Oaten, party president Mr Hughes and treasury spokesman Mr Huhne also joined the race.
Mr Oaten quickly quit the contest following a lack of support by MPs and then stepped down from his frontbench job after newspaper reports of an affair with a male prostitute.
Straw's intervention
Mr Hughes' campaign took a battering after he was forced to admit his sexuality after days of denying being homosexual.
Mr Huhne, who was only elected nine months ago and started out as a relative unknown, has recently been neck and neck with Sir Menzies in the betting.
Foreign Secretary Jack Straw has written to each candidate to ask where they stand on five key issues.
These included whether they would drop the party's opposition to Labour's policies on crime, security and anti-social behaviour and whether they were committed to the party's spending promises on tuition fees and pensions, local income tax, working with the Tories at a local level and plans to scrap Child Trust Funds and the New Deal.
(BBC)
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