Two excellent questions at the end of a very sensible thread summarising the post-Brexit UK FP debate. My own take at attempting to offer an answer - ahead of the IR is as follow:

EU views PMs letter accompanying his formal #Brexit extension request - saying that he doesn’t actually want an extension- as a gimmick aimed at a domestic audience. As far as EU law is concerned: a formal request from the UK prime minister, is a formal request full stop /1

EU leaders not rushing to make decisions. Instead they watch events in Westminster carefully. If their newly negotiated #Brexit deal is approved by the majority of MPs - as the PM promised them it would be - then possibly no extension will be needed OR /2

Only a short one maybe to allow for necessary legislation to be completed. If this is the case, EU leaders won’t think twice about granting this short extension. They may even approve it by writing rather than on person at an emergency #Brexit summit. Spoiler alert../3

EU leaders - who surprise, surprise already have a thing or two planned in their diaries over next couple of weeks - have zero appetite to return to Brussels again especially for #Brexit They have no desire to be involved in the drama playing out right now in the UK BUT /4

If MPs reject the deal, if there are plans for a general election or a referendum on the deal then a longer extension will be necessary. Here it is harder for EU leaders to come to immediate consensus so an emergency summit becomes likely /5

As the transition period ends, the #BrexitDeal applies from tomorrow. But there's also a parallel significant legal change - most of the rest of the withdrawal agreement starts to apply. A thread on the legal issues in the rest of that agreement.

The citizens' rights provisions of the withdrawal agreement (on EU citizens who moved to the UK, and UK citizens who moved to the EU, before the end of the transition period) start to apply.

Annotation and detailed analysis of those provisions here:

After today, UK citizens newly moving to the EU, or EU citizens newly moving to the UK, are in principle governed by national law (partly harmonised by the EU, on the EU side).

However, the #BrexitDeal contains some provisions on visas for service providers.

The #BrexitDeal also refers to the matching unilateral decisions of the EU and UK to waive a visa requirement for short tourist visits. Analysis of the EU law on that issue here:

UK citizens resident in the EU on the basis of the withdrawal agreement (or who move to EU in future) should be covered by the EU law on long-term resident non-EU citizens, which provides for a limited form of mobility between Member States. Analysis here:

[thread]

As we approach "the last throw of the dice"

I would like to do something I haven’t done enough of

Congratulations to 37.4% of the electorate

On the 23rd June 2016 you won

Congratulations

No one can take that away from you

You

Indeed I would like to be the first one to congratulate Boris Johnson

Whatever happens in the next few days

Well done Boris

Whether he gets as a deal

Or indeed no deal

Congratulations on the "win"

You will desperately sell what you won was a "win"

If a deal then with a sale of a side measure of scapegoating narrative as to why it wasn't better

If no deal then the side sale will be the scapegoating as to why

As it will always be someone else's fault

Can I firstly apologise - its obviously because I didn't believe enough or talked the country down

I am not certain which will be sold more desperately

A really shitty deal

or no deal

Prof Valsamis Mitsilegas tells NI committee that the agreement on JHA is dynamic, as EU values UK inputs, and EU law will evolve over time, and value of system to UK will mean adaptation

Prof Steve Peers of Esssex Uni. Tells NI cttee that deal keeps 3/4 of previous arrangement, missing quarter is SIS II and some other capabilities in data exchange. Says quite a lot has been preserved by two sides, esp compared to no deal situation

Simon Hoare MP - is the deal adequate to challenge of policing NI, and IRL: Dr Gemma Davies (Northumbria law school). Says Data Protection issues v complex, PSNI/AGS co-operation might be better facilitated by specific agreement (not going beyond EU agreement, but clarifying)

Colin Murray tells NI cttee that Norway/Iceland extradition arrangements with EU put in place 10 years ago, now working in ways comparable to EU arrest warrant. Operational issues get easier to fix over time.

Colin Murray says there are break clauses in the TCA, and the police element could break down in a relatively short period (in theory).

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So here it is. After the euphoria, the @FinancialTimes @FTMag long read of how @BorisJohnson did his Trade deal with the EU. Tl:dr...not so much “build back better”, more “build back the borders” - stay with me/1.

@FTMag @BorisJohnson The really under-appreciated part of this story is the extent to which the Johnson government, having won its 80 seat majority promising to "Get Brexit Done" then explicitly and actively chose the hardest possible version of #brexit in defiance of commercial interests /2

@FTMag @BorisJohnson Our story begins in January last year when David Frost commenced what Whitehall insiders call a "Star Chamber" process to strip away anything that might be considered more than a "Canada-style" deal - regardless of the fact that UK doesn't trade with EU like Canada! /3

@FTMag @BorisJohnson So what did that mean in practice?

Well, for example leaving EU aviation safety agency (EASA); Chemicals agency (ECHA), not getting a waiver of 'safety and security' declarations for hauliers, not seeking special arrangements for animal products...on and on it goes /4

@FTMag @BorisJohnson Didn't industry object? Well yes it did - but those who yelled too hard found themselves shut out of the door.

Did Whitehall object? Yes it did - Defra and Beis and Treasury all tried at some level to temper the revolutionary fury. But mostly failed. /5