Theresa May is facing the most serious revolt of her premiership as up to 100 MPs pledge to vote to delay Brexit unless she takes No Deal off the table.
Rebel Tories now sense there are enough MPs across the House of Commons to pass the Cooper Amendment - which extends Article 50 beyond the departure date of March 29 - due to be debated on Wednesday.
Four Cabinet ministers were said to have confronted the Prime Minister yesterday and warned they are prepared to vote for the motion proposed by the Tory MP Sir Oliver Letwin and Labour's Yvette Cooper.
It's claimed as many as 25 junior ministers and many others in the government are prepared to do the same to prevent crashing out of the EU without a deal.
Theresa May has been warned she faces a Cabinet revolt and an exodus of MPs if she tries to take Britain out of the EU without a deal
A well-placed source told the Guardian the move will challenge May to sack the rebels who have no intention of resigning voluntarily.
One cabinet Pro-Brexit MP told the paper if it came to the vote, May would have to get rid of rebellious ministers.
'It would be a huge mistake not to sack them. It would be effectively conceding we had lost control of the party,' they said.
Meanwhile, Chancellor Philip Hammond yesterday refused to rule out resigning over the issue, describing No Deal as an 'extremely bad' outcome he was working 'all day, every day' to prevent.
Four cabinet ministers are warning Mrs May against a No Deal Brexit. Amber Rudd (left) and Business secretary Greg Clarke (right) haven't ruled out resigning in the event of No Deal
Former Tory education secretary Justine Greening told BBC Radio 4: 'I don't think I would be able to stay part of a party that was simply a Brexit party that had crashed us out of the European Union'
And two former Tory ministers – Justine Greening and Dominic Grieve – issued public threats to quit the party altogether if Mrs May pursues a No Deal Brexit.
The Prime Minister is under pressure to get a withdrawal agreement passed in the Commons by next Wednesday or, if there is no prospect of an agreement
