The EU is extremely worried:
Corbyn is expected in Brussels on Thursday to meet the EU’s chief negotiator, Michel Barnier, to explain his position. But there is growing concern that Labour’s determination to unseat May could instead propel UK into a “cliff-edge” Brexit, throwing the continent into chaos.

On Tuesday Barnier, gave a downbeat analysis of the state of the negotiations during a private meeting with MEPs.

Afterwards, the leader of the Greens in the European parliament, Philippe Lamberts, told the Guardian: “I have zero trust in Labour, I am afraid to say. The Labour position is not to do with principles, but about tactical considerations. It is all about getting the government out of power whatever the cost.”