Theresa May has been mocked for failing to secure unity within her own cabinet on Brexit as Tory infighting spilled out into the open ahead of a crunch meeting on Friday.
Jeremy Corbyn questioned how Ms May could get a Brexit deal if she could not get her ministers in line, and warned that cabinet infighting was having a "debilitating effect" on jobs and business.
It comes as senior Tories piled in to criticise Jacob Rees-Mogg for "insolence" after the leading Eurosceptic fired off a warning over Ms May's Brexit strategy.
Mr Rees-Mogg, who chairs the European Research Group of pro-Brexit backbench Tories, said she must deliver the Brexit she promised or risk collapsing the government, ahead of crunch cabinet talks at her Chequers retreat on Friday.
Foreign office minister Alan Duncan accused him of "insolence" towards the prime minister, while Alistair Burt, another FCO minister, tweeted: "Enough. Just tired of this endless threat and counter threat. Why don’t we want the best for the U.K. than for our own ideological cliques?"
His comments also attracted criticism from respected backbenchers, such as health committee chair Sarah Wollaston and Tory grandee Sir Nicholas Soames, who told his Tory colleague to "shut up".
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She added: "In the absence of an agreed UK position the EU has made it clear it is preparing for a no-deal outcome. And as we have said so often no deal is the worst possible outcome and it would be catastrophic for the UK."
Boris Johnson has leapt to the defence of a prominent critic of Theresa May as Tory infighting over Brexit intensified ahead of crunch Cabinet talks on the UK's exit strategy.
The Foreign Secretary said MPs should be "able to air their views" after Jacob Rees-Mogg was criticised for saying the Prime Minister must deliver the Brexit she promised or risk collapsing her Government.
Mr Johnson's intervention on Twitter on Monday also appears to put him at odds with a minister in his own department, with Sir Alan Duncan earlier accusing Mr Rees-Mogg of "insolence".
Mr Johnson said: "It's vital that all MPs are able to air their views on Brexit.
"Whatever your position, I hope we can all agree that Jacob Rees Mogg is a principled and dedicated MP who wants the best for our country."
Opinion: Jacob Rees-Mogg is as clueless about Conservative history as he is about Conservative present
If anything should demonstrate the impossibility of Theresa May’s task ahead, Rees-Mogg’s deranged dance around the maypole of Conservative history might just be it, writes Tom Peck
Len McCluskey pledges to campaign for a fresh Brexit referendum if Unite members want one
Campaigners believe support of Unite boss could be crucial in persuading Jeremy Corbyn to back a fresh voteLabour’s Pat McFadden grills May on whether she would extend the article 50 process or the transition.
May says the UK will be leaving the EU on 29 March 2019 but does not mention the transition period.
Bill Cash, an arch Tory Brexiteer, congratulates the PM on the passing of the EU Withdrawal Bill, the government's flagship Brexit bill.
He says there are "disturbing reports" about May taking the UK back into some form of EEA and asks her to clarify.
May rules it out. She said the EU leaders asked if it was on the table but she has vowed that she would not deliver on the referendum or the vote of British people
