Labour figures believe the party fears the evidence against Unite is embarrassingly thin.
Party membership has fallen by 35% since 2010 to 42,501, resulting in a deficit of £411,000.
The block vote was abolished for Labour leadership elections 20 years ago. So why do David Cameron and the conservative press claim it still exists?
The Unite general secretary signalled that he would no longer tolerate those who "welcome our money but don't want our policy input".
The Tories are starting to notice Labour’s higher levels of local organisation.
This isn't a diversion about process. Participative democracy is a key weapon in fighting poverty.
Having previously enjoyed a double-digit advantage over the Tories, the party's lead has been reduced to single figures, far below the level needed to be confident of victory.
A survey by Lord Ashcroft shows 12% of the trade union's 1.42 million members would affiliate themselves to Labour under the new system but also that they oppose large donations to the party.
In an echo of Blair's revision of Clause IV, the Labour leader announces that a Special Conference will be held next spring to approve this "historic reform of Labour’s constitution".
The government's approach has utterly failed. We need a revolution in the way businesses, ministers and schools work together to get young people into work.