Corbyn's shadow cabinet has collapsed with the statesmanship of cockroaches scuttling from a bathroom light. The infighting, the backroom deals – it's just politics as usual, right?

Yet there is something different this time. Ask his supporters and you’ll hear that this coup is against Labour's members as much as its leader. They voted the Islington MP in by a landslide not seen since Blair cruised it in 1994. That mandate stands, the people have spoken, Corbyn has to stay.

But the voice of party members is not the voice of its support. Of the 9.3m people who put a cross in the box of the Labour leader, 2.5m say they probably won't do it again.

And can you blame them? The biggest success of Corbyn's "new politics" is stasis. He's won four by-elections, yes. But in seats Labour already held. May's local election results were trumpeted as being not abysmal. "Clearing a low bar," isn't the kind of promise that fires up the disenfranchised.

Watson on Corbyn

Which is why I've joined the Labour Party, to support those who want Corbyn gone if he manipulates his way into the pending leadership election. To counter the tide of Momentum, as they bolster a leader who couldn't get on the ticket with nominations and will only be able to stand if his lawyers find an incumbency loophole.

Look at Momentum's members, at Corbyn's most vociferous supporters, and you see youth. It seemed like Labour might have finally found a man to energise that electoral unicorn – the non-voter. They didn't have to compromise their values, to shift right to steal Tory voters. Corbyn would deliver that left-leaning chunk of under-30s who'd never engaged with politics.

The favourites in the Tory leadership race Show all 5 1 /5 The favourites in the Tory leadership race The favourites in the Tory leadership race Theresa May The longest-serving Home Secretary in 100 years took a back seat in the referendum campaign. While backing Remain, she did not hit the campaign trail and delivered only a handful of speeches and interviews, and was critical of many aspects of the EU, particularly the European Convention on Human Rights. Hedging her bets allows her to now emerge as a ‘unity’ candidate, and she is said to have been building up her back-room staff in preparation for a leadership bid. She has the significant advantage of having served in one of the great offices of state, in a steady and competent manner that has won her many admirers within party and the civil service. At a time of great instability, it may be that she is viewed as steady hand on the tiller. Mrs May does however, lack the ‘star quality’ of a Boris Johnson and party members may doubt her ability to connect with ordinary voters PA The favourites in the Tory leadership race Michael Gove The Justice Secretary may be able to set himself up as ‘the thinking Tory’s Brexit candidate’. Made an enormous political and personal decision to back Leave, taking on his old friend David Cameron. He performed well during the TV debates, and will be an admired figure among Eurosceptic Conservatives. Along with Johnson, he will be hindered by the fact that he led a very divisive campaign, characterised by ‘blue-on-blue’ action. MPs may also judge that he lacks Boris Johnson’s wider appeal with the electorate. Possibly more likely that he will settle for being his new bosom buddy Boris’s Chancellor Getty The favourites in the Tory leadership race Stephen Crabb Highly-rated Work and Pensions Secretary, raised on a council estate, so could reach out to non-traditional working class Tory voters Getty Images The favourites in the Tory leadership race Andrea Leadsom Minister of State for Energy at the Department of Energy and Climate Change is one of the most prominent figures in the Leave campaign, seen to have performed well in TV debates Rex Features The favourites in the Tory leadership race Liam Fox British Conservative MP and former Secretary of State for Defence, as sources said he will stand for the leadership of the Conservative Party AFP/Getty

But how can any of them can vote for Corbyn's Labour party when he failed to deliver their referendum result? When he was so impotent on the campaign trail and, say the whisperers, actively sabotaged his party's message. Yes, the majority of Labour voters voted to remain. But a third ignored his message entirely, voting against their own self-interest because he couldn't hide his contempt for the EU. That mandate crumbles under the weight of his ineffectiveness.