Labour's deputy leader, Tom Watson, has said a fresh Brexit referendum is "the only way" to solve the current crisis.
Speaking before the major Put it to the People march in London on Saturday, he said the best way to unite the country was to "have a final say - and then live with the result".
It came as Theresa May faced mounting pressure after European Union leaders seized control of the Brexit timetable during late night talks in Brussels.
EU leaders said they would be prepared to defer Britain’s departure until 22 May if the government’s deal is approved next week - if not, then a deadline of 12 April has been set, they added.
Reports suggested that the chairman of the influential 1922 group of Conservatives, Sir Graham Brady, visited Ms May this week and relayed the message that MPs in the party want her to stand down.
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EU leaders decide Brexit fate behind closed doors as May secures Article 50 extension
Theresa May was left waiting while European leaders decided the future of Brexitbehind closed doors.
The prime minister had hoped to be handed an extension of the Article 50 period until 30 June before making a statement from Brussels in the early evening.
Instead, the 27 presidents and prime ministers were locked in talks long into the night after they tore up draft proposals and produced a complicated conditional plan.
Revoke Article 50 petition calling for Brexit to be cancelled hits two million signatures
Over two million people have signed a petition calling for the government to revoke Article 50 and cancel Brexit.
It has become the fastest growing petition ever created on the government’s petition website despite the service crashing several times on Thursday unable to cope with demand as people voiced their discontent for Theresa May’s plans for the UK’s withdrawal from the European Union.
The two million mark was passed shortly after EU leaders agreed to a plan which would delay Brexit from 29 March to 22 May on condition that MPs approve Theresa May's withdrawal deal next week.
Armed forces set up team in nuclear bunker to prepare for no-deal Brexit
Britain’s military has set up a team in a nuclear bunker beneath the Ministry of Defence (MoD) to prepare for a no-deal Brexit.
Some 3,500 troops were being held “at readiness” to aid in contingency plans if the UK leaves the European Union (EU) without an agreement in place, a spokesperson said.
The mission, dubbed Operation Redford, was activated at the beginning of the week. It could see the armed forces working to transport food, fuel and other essentials around the UK.
Labour MP blames Theresa May after he is attacked in the street
An MP has blamed Theresa May after he says he was assaulted in the street.
Lloyd Russell-Moyle said his attacker called him a “traitor” while he was out promoting a final vote on Brexit before grabbing his glasses and trying to hit him.
The incident, on Thursday afternoon, came less than 24 hours after Mrs May gave a speech on Brexit in which she blamed MPs for deliberately delaying her attempts to ensure the UK leaves the EU on 29 March.
When is the Put it to the People march and how you can get involved?
Tens of thousands are expected to attend the Put It To The People march in London on Saturday 23 March – just six days before Britain is supposed to leave the European Union (EU).
Protesters seeking a referendum on the final Brexit deal will once again descend on the capital.
Up to 700,000 people were estimated to have attended a similar march in October - a rally organisers said was the biggest demonstration of its kind.
Speaking on the BBC’s Radio 4 Today programme, the former Ukip leader Nigel Farage said he will take over the leadership of the Brexit part.
When asked if he would stand again in any EU elections for the new party, Mr Farage said: "Absolutely I will.
"The Brexit Party was set up a few weeks ago, it's registered with the Electoral Commission, it is at the moment a virtual party - it's a website - we haven't launched."
Shadow Brexit secretary Matthew Pennycook has been granted an urgent question today in the Commons on the PM’s EU council meeting last night. Expect it just after 11am.
Sir Graham Brady, the chairman of the backbench 1922 committee, was reported to have met with the prime minister earlier this week to tell her that most Conservative MPs now want her to stand down.
The Daily Telegraph said that Sir Graham visited her in Downing Street on Monday after being "bombarded" with text messages from MPs demanding she should go.
The paper said that it was one of a series of direct confrontations with Conservative MPs in the run-up to the summit.
Asked about the claims by The Independent, Sir Graham declined to comment.
Former minister reveals 'significant' donation to The Independent Group
A former City minister under Gordon Brown has disclosed he made a "significant" donation to the newly-formed Independent Group.
Lord Myners, an ex-chairman of Marks and Spencer, said "most of the population don't live at the extremes" and praised the group for gathering together a broad range of voices.
The Independent Group (TIG) sent shockwaves through Westminster when they formed last month, after a string of Tory and Labour MPs quit their parties in protest at the direction each was headed.
The pound is rising after news that Brexit has been delayed
The pound rose against the the euro on Friday morning after news that Theresa May had staved off an imminent no-deal Brexit by agreeing a short extension to Article 50 with the EU.
The prime minister now has an additional two weeks to devise an alternative Brexit plan if her deal fails to be voted through next week.
The UK will now stay in the EU until 12 April if the withdrawal agreement is rejected by MPs for a third time. If Ms May manages to win the backing of MPs the UK can remain in the bloc until 22 May.
Amid the drama of the EU council summit in Brussels on Thursday evening, Emmanuel Macron, the French president, said: “The EU very clearly today has to deal with a British political crisis. British politicians are today unable to implement what the people have asked of them. "
Matthew Pennycook - Labour’s shadow Brexit minister - is now asking an urgent question on the Article 50 extension.
Responding for the government Kwasi Kwarteng outlines the conclusions of the EU Council summit last night.
He says any extension of Article 50 beyond May 2019 will require the UK to take part in European elections later this year - something the PM will not countenance.
Pennycook says given the significance of the summit yesterday, a statement should have been made to parliament, rather than opposition MPs “dragging” ministers to the chamber.
"Whenever the meaningful vote is tabled, if you, Mr Speaker, allow it, I believe this house will vote it down, not least because of the rather hubristic speech the PM made when she effectively attacked members of this house for having the temerity to vote with their consciences. So, I think it won't go through."
Mr Kwarteng replied: "The government's focus at the moment is to make sure we can potentially get a meaningful vote and actually secure the deal on the table, that is what I have always maintained.
"If the meaningful vote doesn't get through, we will have to look at alternatives."
Conservative MPs to be offered free votes on Brexit 'plan B' options, minister suggests
The prime minister’s spokesman was clear that she would only bring her deal back to the Commons for a third meaningful vote when there was a “realistic prospect of success” but it is understood that No10 is gearing up to bring the vote back on Tuesday or Wednesday.
The PM’s spokesman told a regular Westminster briefing that it was up to Commons Speaker John Bercow whether he will allow a further vote - after Mr Bercow ruled the PM could not bring back the deal without substantial changes.
But he added: “There is now European Council approval of the legally binding assurances she negotiated with President Juncker in Strasbourg.
“One should give extra assurance to parliament in the event the backstop is ever used that it will only be temporary.
“The second aspect that the UK and the EU will begin work immediately to replace the backstop with alternative arrangements by the end of 2020. I would point to those as significant issues.”
Ms May is expected to continue discussions with ministers and MPs across the house, before spending the weekend working at Chequers, her country retreat.
