Serious warnings said to be flying about if she doesn't

This, according to a tweet by BBC political editor Laura Kuenssberg. It's all starting to unravel now for Theresa May. No matter what she tries to propose, she will not win.

With regards to the Irish backstop/border, to try and convince some parliamentary members to side with her she has to go with a time-limited backstop but the EU won't accept that. And latest news is that she is trying to push forward with a UK-wide customs agreement, something in which members of her own Tory party aren't too fond of.