Former shadow minister Chuka Umunna - once a favourite to replace Ed Miliband as Labour leader - has dismissed reports that he was being lined up to challenge Mr Corbyn before the next general election.
"This issue of the leadership is settled, we don't need to be talking about this any more," the Streatham MP told the BBC's Andrew Marr Show.
"We need to be working out how we win the next general election, because that's the way we put our values into practice."
Mr Umunna warned that Labour can only win an election as a "broad church" and cautioned against any move to punish those who have rebelled against Mr Corbyn.
"We've got to move on from this notion of crushing people who disagree with us," he said. "The strength of the Labour Party is that it is a broad church. Under our first-past-the-post electoral system ... you can only win if you are a broad church political party, and for the Labour Party you have to take in everyone from the left to the centre-left. If we don't do that, we are not going to be able to heal the divisions in society."
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The election of the Labour party's new leader saw a turnout of 77.6%.
Labour leadership election turnout - 77.6%
With an electorate of around 660,000 members, union affiliates and registered supporters, this suggests that more than half a million people have cast their vote.
It makes it all but certain that Mr Corbyn will increase his overall tally of votes from the 251,417 figure he achieved in 2015, when 422,871 (76.3%) of the 554,272 eligible voters took part.
Expectations are high in Liverpool that he will also improve his 59.5% share of vote from 2015, when the vote was split between four candidates rather than two.
The result of the contest between Jeremy Corbyn and Owen Smith will be announced shortly before noon.
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