So. How does Letwin-Cooper actually work, you say.
Thus we enter one of the most predictable weeks of all Brexit.
On Wednesday there is an emergency EU summit where Theresa May, under force of Parliament, will ask for an Article 50 extension.
On Thursday Parliament will accept the date agreed by Europe.
The Tories can have their leadership contest. Brexiteer or remainer doesn't really matter because either way Brexit is staying dead.
Whereupon the Tories win a majority for remain, and a promise of a new referendum to abandon Brexit for good.
It just took them two years longer than me to work that out.