Opposition Leader Jeremy Corbyn is poised to table a vote of no confidence in the British Government straight after the meaningful vote today if Theresa May's Brexit deal is rejected.
Labour whips have told MPs to be ready for a vote tomorrow, with Corbyn preparing to raise a point of order within minutes of the Brexit result being confirmed today.
The censure motion would take place after Prime Minister's Questions and could be limited to just 90 minutes of debate before MPs are asked to vote, according to a senior Labour source.
Should the censure motion secure the backing of a simple majority of MPs, it would almost certainly force May to resign and would give the Conservative Party just two weeks to form an administration capable of winning the confidence of the House of Commons.
On Friday, Corbyn will then travel to Hastings, Cabinet minister Amber Rudd's constituency, where he will speak at an event that will be seen by many as a potential springboard from which to launch an election campaign.