Dominic Grieve, a leading Conservative opponent of Brexit, has predicted that up to a dozen ministers – including six from the cabinet – could resign if Britain leaves the EU without a deal.

Cross-party move likely to be put forward as amendment to EU withdrawal bill.

Prime minister launches new plan to win backing for her deal as she prepares to update MPs on way forward

Theresa May has been defeated on Brexit by rebel Tory MPs joining forces with Labour and other opposition parties for a second time in two days. But, on a confusing day in parliament, even seasoned Westminster watchers were struggling to follow.

Theresa May will be obliged to present MPs with a new Brexit plan within three days if her current proposal is voted down next week, after a procedural amendment to the plan’s progress through the Commons was passed amid chaotic scenes.