By Joe Mellor, Deputy Editor
Seumas Milne, Corbyn’s communications chief, believes that their PMQs preparations are being leaked internally.
During a documentary for Vice News, where they followed Corbyn for eight weeks, Milne mentioned the “annoying” leaks.
These leaks are giving the Tories the advantage at PMQs, the main focus for holding the government to account for their actions, and by far the most watched Commons session.
With so many dissenters in his party it is hardly surprising that some people are intent on sharing information that could undermine him, and his attempt to become the next PM.
A number of his own MPs have publicly criticised Corbyn and his policy plans, including scrapping the Trident nuclear weapon programme.
The documentary team covered the period which included the May elections and the party row regarding anti-semintism.
The film, which is called Jeremy Corbyn: The Outsider, covers the his team planning and rehearsing for PMQs.
After they have attacked each over the government’s academy plans, Mr Milne tells the Vice reporter: “This time they did (know the questions) because it leaked. It leaked from that meeting.
“It’s very annoying because it only happens about a third of the time, but it obviously gives them a little bit of extra time.
“Whenever there is a leak it gives them that advantage – it gives them the advantage on TV as well.”
Other parts of the film show Corbyn’s aides explaining their attempts to smarten Corbyn up for the cameras and his reaction the Ken Livingstone’s suspension.
Additionally, the Labour leader attacks the BBC over the local election coverage. Claiming the whole focus was that “Corbyn going to lose,” and implying that an unidentified cabal of political commentators were “shallow, facile and ill-informed.”