Amid intense behind-the-scenes arm-twisting today, public services union Unison broke ranks to declared it will oppose the leader‘s Brexit fudge.

But the Momentum pressure group appears to have handed Mr Corbyn a lifeline by signalling its activists will be in his camp, rather than with the Remainers.

In a shock split, its founder Jon Lansman made clear he did not agree with the decision, tweeting that ‚members should feel free to vote with their conscience‘.