Brexit-supporting Tory MPs are attempting to oust the Prime Minister as leader via a no-confidence vote as she lobbies EU leaders for “reassurances” about her deal.
To do so, at least 48 Tory MPs must submit letters of no-confidence in her leadership to Brady, chairman of the influential 1922 Committee.
Mrs May is expected to meet with Brady on Wednesday as Tory MPs and a cabinet minister believe the threshold for a no-confidence vote has been reached, the BBC has reported.
Brady has asked to see Mrs May on Wednesday after PMQs in parliament, the BBC's Political Editor Laura Kuenssberg wrote on Twitter, adding that confirmation was unlikely until Wednesday.
But speaking from Brussels last night, Mrs May told Sky News she hadn’t received notice that the 48 letters needed had been handed to Brady.
When pressed on the issue, she blankly said “no”, suggesting the threshold of letters had not been reached, but did not elaborate.
Instead, the PM said had been attempting to find a way to resolve the issue of the Irish backstop – the main element dozens of MPs want her to scrap.
“Talking to EU leaders about the issues parliament have raised, I have seen a shared determination to deal with this issue,” she told Sky News.
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Mrs May unleashed the wrath of MPs across the House of Commons by delaying a “meaningful vote” on her Brexit deal she said would have been rejected by a “significant margin”.
As she desperately seeks concessions from EU leaders, Tory MPs furious with her for postponing the vote have reportedly submitted multiple letters of no-confidence today.
Tory MPs believe enough letters of no-confidence in Mrs May’s leadership have been submitted within the last 24 hours since she delayed the “meaningful vote”.
Sources from the European Research Group (ERG), chaired by leading Brexiteer Jacob Rees-Mogg, told Sky News the 48 letters required to trigger a vote has been reached.
A number of political reporters, including ITV's Robert Peston, have also claimed the 48 letter target has been breached, citing government, ministerial and Tory sources.
Estimates vary as to how many no-confidence letters Tory MPs have submitted to Brady, who does not publicly reveal the number until the 48 threshold has been met.
Steve Baker, a former Brexit minister and now central figure in the rebellion, has urged his colleagues to submit letters if they’re serious about toppling Mrs May.
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He told the BBC: "The only way to change the policy is to change the Prime Minister. I really think it's her duty now to go."
Baker and Rees-Mogg are among the some 20-odd Tory MPs who have publicly submitted a letter of no-confidence in Mrs May’s leadership.
But George Freeman, Tory MP for Mid Norfolk, urged his party to refrain from toppling the PM.
He tweeted: “To any colleagues thinking of signing their letter to Mr Brady to trigger a leadership election, I beg you not to. The country would never forgive us. If the PM is out of runway, we should have a caretaker Prime Minister until a leadership election in May.”
As the prospect of a leadership challenge looms, Mrs May tonight met with European commissioner Jean-Claude Juncker and EU Council president Donald Tusk.
Mr Tusk described their meeting as "long and frank", adding: "Clear that EU27 wants to help. The question is how."
Earlier today Juncker dismissed the possibility of reopening negotiations, telling Britain “it's the only deal possible” in an address to the European Parliament in Strasbourg.
Meanwhile, German chancellor Angela Merkel told the PM the withdrawal agreement cannot be changed during emergency talks between the two leaders in Berlin this lunchtime.
A spokesman for Downing Street said May and Merkel have agreed to stay in close touch in order to get the Brexit deal through parliament.
Back in Westminster, Jeremy Corbyn has insisted he will wait until the "appropriate time" to table a motion of no confidence in her government.
The Labour leader told MPs that Mrs May must admit her Brexit deal is "dead" and criticised her "shambolic" Brexit negotiations.
He told MPs: "She no longer has the authority to negotiate for this country when she doesn't even have the authority of her own party."