Jeremy Corbyn will automatically be included on the ballot in Labour's leadership contest following a vote by the ruling National Executive Committee (NEC).
The secret vote went 18-14 in the Opposition leader's favour following hours of talks at the party's headquarters in central London.
A Labour Party spokesman said: “The NEC has agreed that as the incumbent leader Jeremy Corbyn will go forward onto the ballot without requiring nominations from the Parliamentary Labour Party and the European Parliamentary Labour Party.
"All other Leadership candidates will require nominations from twenty percent of the PLP and EPLP.”
The shadow chancellor earned loud cheers as he launched an foul-mouthed attack on the MPs seeking to replace his friend Corbyn.
The MP for Pontypridd resigned as shadow work and pensions secretary last month in protest at Jeremy Corbyn's leadership.
I now realise that my earlier description of the NEC meeting - as an omni-shambles - was generous.