After a weekend of frantic talks from the Prime Minister's own ranks about their future, Theresa May is expected to communicate to parliamentarians that, since the disastrous summit in September in Salzburg, "significant progress" has been made.
With less than six months left for Britain to leave the EU, talks have stalled over a disagreement over the so-called "backing" of Northern Ireland, a position of last resort to protect an open border on the island of Ireland in the case that the UK leaves the EU without getting a global agreement.
Protocols have also been developed on how Brexit will impact Gibraltar and the United Kingdom military base in Cyprus.
Facing some of the toughest attacks to date on her Brexit plans after she again failed to reach an agreement at an EU summit last week, Ms. May will say: "Taking all this together, the 95 percent of the Retirement Agreement and its protocols are now placed. "
And while Ms. May prepares to present her plan, the British are mainly concerned with three key issues: the extent of the transition, the customs union and the "significant vote".
Here are the three problems that explain to the Brexiteers that are at night
Theresa May's willingness to consider an extension of the post-Brexit transition last week is probably what most worries Tory's parliamentarians, both those who stay and those who remain.
The current plan is for a 21-month transition period to pave the way for Brexit to the United Kingdom and the future permanent relationship of the EU.
The transition period must end on December 31, 2020.
But even when the two parties can not reach an agreement, the Prime Minister said that this agreement could be extended "for a few months" if necessary.
A leading Brexit support member told Playbook: "People were very upset on Thursday.
"And they probably talked to the voter associations over the weekend, she'll have to go back on this."
The United Kingdom and the EU want to avoid a "hard border" between Northern Ireland and Ireland or the so-called "endorsement".
Fears abound among the Brexiteer ranks that the support proposed by the United Kingdom, a temporary customs agreement across the United Kingdom that closely resembles a customs union, could become a permanent limbo that the country will never abandon.
And, therefore, you will never be able to achieve the free trade agreements that Brexiteers crave so much.
The others will want answers after the letter from Brexit's secretary, Dominic Raab, last week, in which it is suggested that the so-called meaningful vote in any deal with Brexit that Ms May assures will be anything but significant.
The meaningful vote is the common name given to Section 13 of the Law of the European Union of 2018 that says "Parliamentary approval of the United Kingdom of the result of negotiations with the EU".
In June, a group of rebels held in the House of Common was going to defeat the bill in an attempt to secure a "significant vote" that could have given parliamentarians the power to prevent Britain from leaving the EU without a agreement.
However, the measure was defeated with 319 votes against 303, with the bill in progress and a compromise between the rebels and Downing Street was reached and it was agreed that the deputy would "have a significant opinion".
But Raab's letter seems to have reopened the battle over the so-called "significant vote," while he wrote: "Once the agreement is presented to parliament, the procedure through which a vote is to be held must allow for an unequivocal decision, and one that is clear for the British public.
"Anything other than a direct approval of the agreement will bring enormous uncertainty to businesses, consumers and citizens."
If the motion can not be amended, parliamentarians would be prevented from submitting changes to the agreement, as verified by the country in another referendum.