Thread by @Staedtler

Twitter, I think it's going to be alright. Watch

If Parliament accepts the withdrawal agreement next week, the Article 50 period can be extended till May 22nd.

If Parliament does not accept the withdrawal agreement next week, then we can shift the Date of Doom from March 29th to April 12th to give us a couple of weeks to decide what we want to do.

As to parliamentary process, it's most peculiar. The Speaker has already rules out another vote on May's withdrawal agreement, so he would first have to change his mind.

But even then all is not lost because the Tories are coming to the rescue - as I always thought they would - in the shape of Dominic Grieve and Oliver Letwin, who are going to table an amendment on Monday to allow parliament to decide what happens next.

Apparently, everyone thinks the Grieve-Letwin amendment will go through on Monday, and Parliament will get to decide what happens with Brexit on Wednesday.
Theresa May's resignation will have no effect on the Commons procedures to this effect.

So there we have it. At the final turn of the dice, the answer seems to be:

The Withdrawal Agreement never gets through parliament. Theresa May resigns this weekend. Parliament operates perfectly well without her and votes to cancel Brexit.

And if that's what does happen, I will have been right all along. The Tories sack Theresa May and abandon Brexit.

Damn, that's good.