EU referendum, brexit and the aftermath

How will they get the no deal bit past parliament?

By running down the clock, I suspect - if parliament send May back to re-negotiate at the end of Jan there's not enough time to ratify anything she gets.

What is needed is a way for Parliament to issue an A50 retraction, and I don't believe that mechanism exists.

We leave by automatic operation of law on the 29th, no matter what we've arranged (or not) in the meantime.