BORIS Johnson's bid to get his Brexit deal passed was scuppered today in a 'super Saturday' historic vote.
MPs voted for Sir Oliver Letwin's amendment, which means the PM now has to write to the EU asking to delay Brexit again. Here's what happened.
What time did MPs vote on the new Brexit deal?
Prime Minister Boris Johnson faced a Brexit showdown with parliament today after clinching a last-minute divorce deal with the EU.
The Commons sat from 9.30am and the Lords from 10am.
Voting on Boris Johnson's deal started after 2.30pm, with MPS agreeing to back Tory rebel Sir Oliver Letwin's amendment.
It ruined the PM's chances of passing a deal today and finally getting Britain on course to leave the EU on October 31.
Sir Oliver's amendment withholds approval of the PM's deal until after Parliament has passed the necessary laws to enact it.
But crucially that will trigger the Brexit-blocking Benn Act, which requires the PM to write a letter to the EU seeking a three-month extension by 11pm.
What's happened so far?
Boris Johnson has appealed to MPs to get behind his Brexit deal, warning any further delay would be "pointless" and "corrosive" of public trust.
With Parliament sitting on Saturday for the first time in 37 years, the Prime Minister said the agreement he struck in Brussels represented "the best possible solution".
However he facedt he prospect of further deadlock in the Commons, with opposition parties threatening to withhold approval until legislation to implement the deal is in place.
The architect of the plan, former cabinet minister Sir Oliver Letwin, said it was simply an "insurance policy" to ensure the UK could not "crash out" of the EU without a deal on October 31.
MPs backed the amendment, so today's meaningful vote will be pushed back for days until ALL the Brexit legislation is done.
Johnson now has to beg for an extension by letter by 11pm.
Boris blasted the act of sabotage as a "delusion" and warned that further delay would be "pointless, expensive and deeply corrosive of public trust."
And he said again he would rather be "dead in a ditch" than seek an extension.