Corbyn doing his thing
The government's own analysis shows this deal would make is worse off
If she can't negotiate a better deal then "she must make way"
If she's going back to Brussels, she get the consensus of the House
We've endured two years of shambolic negotiations
The government is in disarray
My guess is that Corbyn thinks he has a better chance in an election against Rees-Moog or Johnson or someone else. It's self-serving and will hurt the UK but Labour wants disarray and power.
That's politics.