Cross-party talks aimed at breaking the Brexit impasse appear to be on the brink of collapse, as Theresa May fights to keep her deal alive to prolong her premiership.
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Chances of the prime minister receiving Labour support for the Withdrawal Agreement Bill seem to have faded, with Jeremy Corbyn's party frustrated at the lack of progress in discussions.
The parties' negotiating teams have been holding talks over the last six weeks but there has not been a breakthrough.
May will set out the timetable for her departure in early June after a crucial Commons vote on the agreement she thrashed out with the EU, with defeat likely to hasten her exit from Number 10.
In a sign the negotiations are foundering, Corbyn said he found it hard to deal with a Government in "disarray" and warned "the time limit is very soon".
But Number 10 insisted on Thursday night the talks process remained alive.
There were meetings between officials on Thursday and the prospect of the talks collapsing was "not how I see it", a senior source said.
Labour's Hilary Benn, chairman of the Brexit Select Committee, said there was little point in continuing the cross-party talks if they were going nowhere.
"It doesn't come as a great surprise to me because over the six weeks they've been going it doesn't appear that much progress has been made," he told BBC Radio 4's Today programme.
"If there's not going to be any progress then there wouldn't be much point in carrying on."
Meanwhile Tory former Cabinet minister Nicky Morgan warned that aligning with the Brexit Party would be the "death knell" for the Conservatives.
Elsewhere European Commission president Jean-Claude Juncker has spoken of his regret at not speaking out during the campaign about Vote Leave's campaign claim that the UK sends the EU GBP350 million a week.
"If there's not going to be any progress then there wouldn't be much point in carrying on."
In an interview with Austrian paper Der Standard, he said: "I think it is an incomprehensible error on my part that I did not intervene in the Brexit campaign owing to British wishes.
"So many lies were told, so many of the consequences of a 'no' were misrepresented, we as a commission should have spoken up."
The prime minister will meet the chairman of the Tory backbench 1922 Committee Graham Brady at the start of June to agree to the details of the leadership contest to succeed her.
The move follows a lengthy meeting on Thursday between May and the 18-strong 1922 executive during which she again came under pressure to name her exit date from Downing Street.
Even as the summit was taking place in Westminster, former foreign secretary Boris Johnson galvanised the race to succeed her, confirming he would be a candidate.
May and Graham's next meeting will come after the WAB has received a second reading vote in the Commons in the week beginning June 3.
Downing Street insiders indicated that if the Bill cleared its first Commons hurdle, May would seek to persuade the 1922 Committee to allow her to remain in office and secure Brexit, letting her leave having completed the main goal of her administration.
May wants the legislation to complete its progress by the time Parliament rises for its summer break, which is usually near the end of July.
"If the WAB goes through, she could say 'this is my path for getting the Bill through Parliament, obviously it is something that is important to the '22 to see Brexit delivered, and I want to see that through' and then she is out after phase one," a source said.
But if the WAB was defeated, she would face intense pressure to quit immediately.
The source said "she would have to say 'this is how I envisage the timetable for a leadership election happening' and there would have to be some sort of agreement about that".
Graham said the meeting with the prime minister on Thursday was a "very frank discussion". ■
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