Theresa May's Brexit vote is 'on a knife edge': Here's what experts predict

On Tuesday, lawmakers will vote for a second time on May's Brexit deal after initially rejecting it in January. If a simple majority of them don't approve the deal, they will then vote on whether they want to leave the 28-member bloc without a deal.

If they vote against a "no-deal" Brexit, they'll then have a vote on whether to extend Article 50 (which sets out the departure process) and delay Britain's departure which is currently set to take place on March 29.