[isostatic]

Note: I use the word deal to mean the withdrawal agreement, which is an agreement on how we leave, not on the future direction.

Deadlines April 12 -- if mays deal has passed, extended to May 22 to allow domestic legislation to be passed to implement the deal

If not passed by then, then uk leaves with no deal

However May's government can ask for an extension at any point up until April 12th. This extension will rely on the UK participating in the EU elections. Those elections can be held if announced by or on April 12th -- there's a reason it's that day and not April 3rd or 19th.

It's almost certain we'll be looking at a long delay, and either a referendum or general election