OPPONENTS of Boris Johnsons EU deal were last night plotting a desperate final bid to shoot it down.
A rainbow alliance of Remain MPs, Labour and rebel Tories was forming to discuss action.
In a landmark moment, MPs today vote for the first time on the new law that will take Britain out of the EU, with the new agreement in place.
The Government last night announced a breakneck timetable of just three days for the key bill to clear all its Commons stages.
The PM issued a plea to all MPs saying: Lets get Brexit done on October 31 and move on.
But the Withdrawal Agreement Bill faces potential pitfalls to stop it from clearing Parliament in time for the exit deadline of October 31.
Senior Lib Dem, SNP and even DUP MPs were in frantic talks with Jeremy Corbyns senior lieutenants on how best to sabotage the bill.
A senior Downing Street source familiar with the latest numbers tally told The Sun that voting on it today and tomorrow will be very tight.
Last night there were worries among Tory whips that they could lose the programme motion vote.
It will be formally opposed by every other party including the Governments former allies, the DUP leaving ministers having to rely on as many as 20 pro-Brexit Labour or independent MPs to bail them out.
The Sun can reveal the SNP as well as Lib Dems are actively considering switching their long-standing position on a customs union.
That would leave the Government needing around 15 Labour MPs and independents to vote with ministers, as only four rebel ex-Tories are expected to back the plan.
Our analysis of MPs thinking last night revealed the third option, a second referendum, was falling short.
Labour Party insiders said 35 of its MPs will defy Mr Corbyns three-line whip and vote against any new nationwide poll. Around ten more are expected to abstain on it.
‘GOING TO LOSE’
Four of the sacked Tory rebels are expected to join at least one of the votes designed to wreck Brexit plans. The groups ringleader Dominic Grieve said: Its a major piece of constitutional law and rubber-stamping it in less than four days would be nonsensical.
Labour whips have privately conceded defeat in a bid to stop Mr Johnson winning a majority for his Brexit deal if rebels fail to water it down.
They expect up to 15 MPs will back the deal by the time the final Commons vote on rubber-stamping it is held.
A Labour source told The Sun: Were going to lose eventually if the deal is still standing by the end.
But its just about trying to hold out for as long as possible so we can get a chance to vote for a second referendum.
The Government last night published the 110-page draft legislation needed to implement the Brexit deal.
A clause exempts it from having to be laid before Parliament for 21 days before it can be ratified.
In a a bid to pass the bill, ministers told MPs they must sit until after 11pm Tuesday.
They will have up to 12 hours to debate and vote on further stages tomorrow.
A further eight hours are earmarked on Thursday for a final showdown Third Reading vote.