Cross-party talks on a compromise Brexit deal are hanging in the balance, with Theresa May expected to come under pressure at Tuesday's Cabinet to pull the plug.

No substantive progress is understood to have been made in talks on Monday evening, as Jeremy Corbyn told Labour MPs the Government was not shifting on its red lines.

At a stormy meeting in Westminster, Mr Corbyn came under fire over his ambiguous Brexit stance from a string of Remain-backing MPs, with one warning the party was "haemorrhaging" votes in the upcoming European election to parties - like the Liberal Democrats and Greens - which have given clear backing to a Final Say referendum on any deal.

As Labour's deputy leader Tom Watson and shadow Brexit secretary Sir Keir Starmer both said it looked impossible to get a deal through Parliament without the promise of a "confirmatory" public vote, Mr Corbyn told backbench MPs he understood their frustrations.

Cross-party talks now entering their seventh week broke up without agreement. And notably, there was no immediate announcement from either side of plans for further meetings.

Who could succeed Theresa May as Conservative leader? Show all 9 1 /9 Who could succeed Theresa May as Conservative leader? Who could succeed Theresa May as Conservative leader? Boris Johnson Former foreign secretary Boris Johnson has long been hopeful, he previously stood in the leadership contest that followed the Brexit vote and has at many times since been thought to be maneuvering himself towards the goal. He remains a darling of the party's right wing, particularly those in the ERG, and is the most popular choice among Tory voters but his leadership bid would be fiercely opposed by many MPs PA Who could succeed Theresa May as Conservative leader? Michael Gove Environment secretary Michael Gove is another member who has long wanted to be leader. He has lately been known for rousing his party in the commons, his recent speeches on the Brexit deal and Labour's no confidence motion have overshadowed the Prime Minister's. He has been loyal to the Prime Minister, partly to shed his reputation as a backstabber who abandoned Boris Johnson to stand against him in the 2016 leadership election Getty Who could succeed Theresa May as Conservative leader? Dominic Raab Former Brexit secretary Dominic Raab has emerged as a favourite to be the Brexiteer candidate in a contest to succeed to Ms May. He displayed a grip on detail in his role as Brexit secretary. When asked recently if he would like to become prime minister he replied "never say never" Getty Who could succeed Theresa May as Conservative leader? Rory Stewart International development secretary Rory Stewart is pitching himself as the sensible candidate, promising to rule out both a second referendum and a no-deal Brexit. He was only recently promoted to the cabinet, previously serving as prisons minister, where he caught headlines with a pledge to resign if he could not reduce levels of violence within a year PA Who could succeed Theresa May as Conservative leader? Esther McVey The former work and pensions secretary announced that she will be standing for the leadership when May leaves. McVey is the first to explicitly state that she intends to stand. She resigned from the cabinet in protest over May's Brexit deal AFP/Getty Who could succeed Theresa May as Conservative leader? Sajid Javid Home secretary Sajid Javid is said to have a plan in place for a leadership race. He made headlines over Christmas when he declared that people smuggling over the English channel was a "major incident" and more recently when he revoked the citizenship of ISIS bride Shamima Begum. Son of a bus driver, he wants the Conservatives to be seen as the party of social mobility PA Who could succeed Theresa May as Conservative leader? Jeremy Hunt Foreign secretary Jeremy Hunt was recently thought to be the favourite in the event of a leadership race as he could sell himself as the man to unite the party. Critics worry that his long stint as health secretary could return to haunt him at a general election. He has reportedly been holding meetings with Tory MPs over breakfast to promote his leadership PA Who could succeed Theresa May as Conservative leader? Andrea Leadsom Following the Prime Minister's second defeat over her Brexit deal, Leader of the house Andrea Leadsom hosted a dinner party at which "leadership was the only topic of conversation", The Times heard. Leadsom ran against Theresa May in the 2016 leadership election before dropping out, allowing May to become Prime Minister AFP/Getty Who could succeed Theresa May as Conservative leader? Priti Patel Former international development secretary Priti Patel is thought to be positioning herself as a contender. One MP told The Independent "she knows she's from the right of the party, the part which is going to choose the next leader, so she's reminding everyone she's there." Patel left the government late in 2017 after it emerged that she had held undisclosed meetings with Israeli officials PA

A Labour spokesman said simply that the shadow cabinet and trade unions would be "updated on what has been discussed".

And Downing Street said: “In preparation for an update to Cabinet tomorrow, today’s meeting took stock across the range of issues discussed in talks over the last few weeks. We continue to seek to agree a way forward in order to secure our orderly withdrawal from the EU.”

Tuesday's Cabinet meeting is expected to feature a substantial debate on the state of talks, with some Tories warning that Ms May has no prospect of securing a deal which could win the backing of her own party.

Some urged her to stand down after the May 23 Euro-elections, which polls suggest will deliver a drubbing for her party.

The latest YouGov study for The Times put the Tories on just 10 per cent for the European poll, in an unprecedented fifth place behind Liberal Democrats and Greens. Nigel Farage’s Brexit Party enjoyed a comfortable lead on 34 per cent, ahead of Labour's 16 per cent.

Ms May will be pressed to set out a timetable for her departure when she meets the executive of the backbench 1922 Committee on Thursday, amid speculation that they will clear the way for an early no-confidence vote if she refuses.

One member of the 1922 executive, Nigel Evans, said he hoped Ms May will use Thursday’s meeting to ask chairman Sir Graham Brady to fire the starting pistol in the race to replace her.

Asked whether he expected a Tory humiliation in the May 23 vote, Mr Evans said: "Humiliation? No, it's worse than that.”

Leading Brexiter Jacob Rees-Mogg hit out at the "complete vacuum of leadership" at Westminster, and pleaded with Tory voters to stick with the party in order to provide a base for a new leader to rebuild.

And former minister Ed Vaizey said Ms May should go after the Euro-elections, naming Michael Gove as his preferred replacement.

“The only thing I can see that would keep her in office would be if by some miracle she can produce a deal with Labour and argue that she needs time to see if she can get it through Parliament,” he told Channel 4 News.

Jeremy Hunt, the foreign secretary, said it was "crunch week" for the cross-party negotiations, but rejected the possibility of a second referendum as “a betrayal of what people voted for”.

But Sir Keir Starmer, warned it would be “impossible” to get an agreement through Parliament without the promise of a confirmatory ballot, as up to 150 Labour MPs would reject it.

And Mr Watson said it would be “very, very difficult” to construct a deal which could secure Commons approval without a referendum.

Tom Watson says it would be 'difficult' for his party to pass a Brexit deal without another referendum

In direct contradiction of close Corbyn ally Barry Gardiner’s insistence that Labour was “not a remain party”, Mr Watson said it was “a remain and reform party” in the context of the Euro-elections.

Their stance puts them at odds with Mr Corbyn’s position that a second referendum remains an option only to prevent no-deal or a “damaging Tory Brexit”.

One Labour opponent of a People’s Vote, backbencher Stephen Kinnock, warned that talks risk being “torpedoed” if Labour introduced an “additional red line” of a second referendum.

Campaigning in Labour MP Yvette Cooper’s West Yorkshire constituency, Mr Farage denounced calls for a confirmatory referendum as “the most outrageous proposal I've ever seen”.