12.47pm: Diane Abbot has been confirmed as a candidate for the Labour leadership. Very pleased for the sake of diversity that a parent who sends her children to private schools is in the race.
10.25am: The Guardian's Andrew Sparrow is tweeting that Andy Burnham has got enough nominations to enter the Labour leadership race. He borrowed a few of Ed Balls' nominees apparently.
John McDonnell has withdrawn from the race, backing Diane Abbott. Paul Waugh had the scoop:
“I stood for the Labour leadership as the candidate of the Left and trade union movement so that there could be a proper debate about Labour’s future in which all the wings of the party were fully represented. It is now clear that I am unlikely to secure enough nominations and so I am withdrawing in the hope that we can at least secure a woman on the ballot paper. Yesterday I wrote to Harriet Harman to urge her to use her position as Acting Leader in association with the party's national officers to secure a reduction of the qualifying threshold for candidates to be allowed onto the ballot paper. Regrettably this has not occurred and so I have no other option but to withdraw in the interests of the party. I know that many Labour activists and trade unionists will be disappointed that their candidate will not be on the ballot. I am urging them to continue the fight for democracy within the party so that in future leadership elections rank and file members will be represented by the candidate of their choice.”