Theresa May will face a showdown meeting with Tory MPs tomorrow night as they demand she names a date to resign.
Pressure on the PM to lay out a departure timetable is reaching fever pitch ahead of the crunch meeting of the powerful 1922 Committee.
Conservative MPs have openly urged their leader in recent days to name a date to resign - in some cases, in exchange for them approving her Brexit deal.
Reports suggest Mrs May hinted at naming a date in a Chequers summit on Sunday, but stopped short of doing so.
Now it has emerged she will address the Committee, the body for Tory backbenchers, in Parliament at 5pm tomorrow.
What are indicative votes? Meaning of MPs controlling Brexit and how it'll work
Brexit: Jacob Rees Mogg signals he'll BACK deal in major boost to Theresa May
That has sparked fevered speculation she could finally lay out a timetable for her exit from Downing Street.
Mrs May - who has promised to leave by summer 2022 but not sooner - cannot be challenged for the Tory leadership again until December, because she has a year's grace for surviving the last attempt.
But so-called 'men in grey suits' of her Cabinet have demanded she stands down in exchange for MPs backing her deal.
That could allow Brexiteers a chance at installing a hardliner for the next stage of talks with the EU.
The Sun newspaper has called on the PM to go, while Brexiteer MP Anne-Marie Trevelyan said: "We now need a leader who believes in our country and wants to take her on the next stage of her journey."
Meanwhile Tory George Freeman, who backs the soft Brexit Common Market 2.0 plan, said in recent days: "We need a new PM who can reach out (and) build some sort of coalition for a Plan B."
Downing Street have previously refused to comment on speculation about the PM quitting, suggesting only her husband Philip knows her intentions.
And a coup attempt flopped at the weekend after both figures said to be her successor, Michael Gove and David Lidington, pledged their loyalty to the PM.
Yet this is the last chance for Mrs May to get her twice-rejected deal through Parliament 'cleanly'.
If it passes by this Friday the EU will delay Brexit to May 22.
If it does not, the EU will delay Brexit to April 12 - at which point Mrs May must choose between no deal, revoking Article 50 or a "long extension".
Brexiteers fear that could lead to more chaos, a general election or no Brexit at all.
And they are nervous about What are indicative votes? Meaning of MPs controlling Brexit and how it'll work that could pivot to a soft Brexit.
Some Leavers showed signs of swinging towards the deal today, with Brexiteer ringleader Jacob Rees-Mogg Brexit: Jacob Rees Mogg signals he'll BACK deal in major boost to Theresa May
But the DUP refused to budge, with Brexit spokesman Sammy Wilson branding the deal "toxic" in what he called a "war of attrition".
