Follow live updates and analysis and watch on our video stream as party grandees turn up for the big reveal in Liverpool.
The leadership announcement begins at 11.45am and will be over within a few minutes.
But you can expect a busy day of reaction and fallout as Labour digests its future.
Jeremy Corbyn arrived in Liverpool last night on a genuinely ‘ram-packed’ train.
Here’s a few photos of his arrival at Lime Street.
The route in to the secure zone at Labour Party conference is lined with some people who probably weren’t going to get a stand inside.
Here’s a few of the items thrust into our hands on the way to the conference.
“Corbyn has tripled membership”
Veteran left-winger Dennis Skinner has been holding court outside the conference venue.
He says Jeremy Corbyn has tripled the party’s membership.
A funny thing happened to us on the way to the conference…
So Team Mirror headed up to Liverpool on a train last night, and you’ll never believe who was in my seat…
That’s right, the leader of her majesty’s loyal opposition, Jeremy Corbyn himself.
It’s an almost unbelievable, but totally true story.
Liverpool fans get involved
We’ll have full live coverage of the result when it’s announced from 11.45am, followed by reaction and analysis as the day goes on.
Liverpool fans will be unfurling this banner in the Kop at their match against Hull today.
Burnham warns damage to party could be “terminal”
Warring Labour MPs need to rally round Jeremy Corbyn if – as expected – he is re-elected as party leader with an even bigger mandate from grassroots activists, a senior member of the shadow cabinet has warned.
Andy Burnham, the shadow home secretary, said the damage to the party could be “terminal” unless Mr Corbyn was given a proper chance to get his message across to voters.
However, Labour grandee David Blunkett warned the chances of peace between Mr Corbyn and the majority of his MPs appeared “minuscule” and questioned whether any sort of workable compromise was possible.
The veteran left-winger is the overwhelming favourite to see off the challenge from rival Owen Smith when the results of the leadership election are announced in Liverpool shortly before midday.
Mr Burnham, who was neutral in the contest, said that once the result was announced the two sides needed to find a “new consensus” to enable them to work together.
He said that Labour MPs who walked out of the shadow cabinet should be prepared to serve on the frontbench and “to do so constructively”.