Logjammy

Notice how the artificial deadline, the stated purpose of which was to blackmail our EU partners into a better deal, may now actually be used to blackmail Parliament into accepting it. 

Yet, unless said body has a collective 'ahhh, fuck it' moment on Saturday, Boris's tweak of Theresa's deal  — largely the addition of the word 'great',  spoken with the the sort of enthusiasm his predecesssor could never muster  — is unlikely to be voted through within the existing timeframe. 

Some of Parliament's logjammy characteristics are more fixed than others:

• The DUP (“They’re waiting for us to blink, but we’ve cut our eyelids off”) will not vote for trade arrangements that leave Northern Ireland at what they perceive to be a relative disadvantage
• The SNP, Plaid Cymru and the Lib Dems will not vote for Brexit in any form
• The Labour Party doesn't want to take any noticeable stance before an election they'd rather fight on social justice issues.

In practice Labour's official position may turn out to be an attempt to square the circle by agreeing to the deal on condition of a second referendum. 

It's hard to see how they'd consent to give the Tories their election before the Brexit wave form has collapsed.  But in the background blame game the spotlight this weekend will be shining uncomfortably brightly on Jeremy Corbyn.

Boris is going to have to bring almost all his own rebels back on board while teasing a significant number away from a weakened Corbyn. He may end up with the votes he needs to prevent the second plebiscite, but fall short of getting his deal passed. 

At which point the EU 27 may have a collective "Ahhh, fuck it" moment.