Prime Minister Theresa May has called off Tuesday's crucial vote on her Brexit deal so she can go back to Brussels and ask for changes to it.
As it stands the deal "would be rejected by a significant margin" if MPs voted on it, she admitted.
But she said she was confident of getting "reassurances" from the EU on the Northern Ireland border plan.
MPs reacted angrily to her announcement with Labour's Jeremy Corbyn saying she had "lost control of events".
The U-turn came after the PM and senior ministers had spent days insisting the vote would go ahead, despite the scale of opposition from MPs being obvious.
In other Brexit developments
The pound dived to an 18-month low against the dollar when news of the delayed vote broke
The European Court of Justice ruled the UK can cancel Brexit if it wants
Commons Speaker John Bercow called on the government to give MPs a vote on whether Tuesday's vote should be cancelled. But his plea was rejected by Downing Street
Source: bbc