[redcalx]

The April 12th deadline is conditional on the PMs deal, if that doesn't go through then May 22nd is the current date at which no deal exit will occur if nothing else happens, i.e. that's the current letter of the law. So the vote(s) on Monday are about finding an alternative to no deal before May 22nd. Even if they agree on an option, the EU can still refuse and stick with no deal on the 22nd.

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Edit: See comments below - I got the dates wrong.

[orra]

You have it backwards.

With a deal, the deadline is May, allowing time for some of the necessary domestic legislation.

[NikkiA]

Also the April 12th deadline gives some time for EU elections to be arranged in the UK, which will be a necessity of any delay now.

[redcalx]

noted, thanks.

[orra]

No worries. It is incredibly easy to get confused. As you know, the backdrop is MPs spouting nonsense, who are not held to account effectively by domestic media.

[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