Time now for the Labour leadership results...

The Labour leadership election has been "as much a referendum on the political culture of the Labour Party as it has been about the candidate's policy", says Tom Watson. It's also been an indictment of politics as a whole, he adds, saying people are sick of the old way of doing politics. "If we embraces this and face it together we can turn it to our unstoppable advantage," he tells the room. And in a message to "sniggering" Conservatives, Mr Watson adds: 

The leadership candidates applaud Tom Watson as he warns the Conservatives to "watch their backs" and insists Labour can win in 2020. 

Labour MPs and activists listening to Tom Watson's victory speech. 

Tom Watson says it's been "a strange campaign" but one which has given him time to reflect on early political memories - recalling first the miners' strike in 1972. He goes on to thank some of the unions for their endorsement.

Mr Watson says he will back the party's new leader "100%" and "I ask you to do the same" - as he appeals for unity to fight the Conservative government.

"To those who feel alarmed by the scale of differences between the old world and the new world, there s only one Labour," he says, "and it's bigger than its leaders, members or supporters".

Tom Watson thanks all those who made his victory possible and says there's been a Conservative government for too long and says Britons believe in giving people "a fair crack" and says it is a critical moment for the Labour Party.

In a short acceptance speech, Tom Watson confesses that "nothing really prepares you for this moment". He says he'd been writing his speech backstage with his children - who advised him the first thing to do was to "thank your mum and dad". But he adds a third thanks - to his campaign manager.

Tom Watson addresses the audience after being elected deputy leader. 

Tom Watson won the deputy Labour leader contest in the third round of voting, with 50.7% of the vote. Stella Creasy came second with 26% and Caroline Flint third with 22%.

Tom Watson has been elected as the new deputy leader of the Labour Party.

Andy Burnham and Yvette Cooper watch the deputy leadership result being announced.

Tom Watson is ahead in the first round of voting with 160,852 votes - representing 39.4% of the votes. As no candidate has achieved more than 50% of the vote, the candidate in last place - Ben Bradshaw - is eliminated and his second preference votes distributed.

The turnout for the deputy leadership election was 408,470 votes.

First up is the deputy leader results, which will be announced by NEC chairman Jim Kennedy. He will be providing round-by-round results.

BBC Radio 5 Live

Jenni Russell, columnist at The Times, tells BBC Radio 5 Live if Corbyn is elected, the Labour Party could be "riven". 

The deputy and Labour leadership candidates are welcomed into the room, to a standing ovation from the assembled crowd. Lots of smiles on all their faces... they're giving nothing away, it seems...

Sadiq Khan says he never dreamt that as "a south London boy, a son of immigrants, who grew up on a council estate I could ever be standing here today". He says he's "humbled" to have been selected - and pays tributes to his fellow candidates, and those standing for the deputy Labour leader and leader roles. To win, Mr Khan says, Labour needs to show it is in tune with the lives of the British people, understand the challenges people face and share their ambitions. In a message to the party, he says that whatever the outcome of the result today, "we must pull together".