You cannot possibly know this.
I know it can revoke. Whether this will be accepted at the european court, no one knows. But it will quite likely be influenced by how sincerely the EU means it.
Revocation would have to be agreed as being possible by both the UK's Supreme Court and the ECJ.
It certainly would not. The UK court has nothing to do with it, except as a stepping stone for a case going to the ecj.
The UK Supreme Court has not formally tested this, but the previous constitutional judgments assumed that it was irrevocable.
Only because the parties to the case both argued this to be the case. UK courts do not comment on agreed facts, however stupid, but arbitrate what is disputed.
"We are content to proceed on the basis that that is correct, without expressing any view of our own."
Exactly. this was the view of the plaintiffs, not the court.
I've started by saying that "you cannot possibly know this", and I need to be careful about suggesting I know something,
yes you do. In fact you already broke that rule in the previous post, which is why I said you are wrong.
If it can be revoked then the UK could revoke it the day before and immediately re-submit
indeed it could. Many have said the treaty is less than ideal.
. Any nation could start playing a game of extracting concessions from the EU.
perhaps that is why the EU isnt going to give any concessions to anyone, including the UK? The EU told us its terms before negotiations began. Leave asid it was rot and the EU would change. It wont. there will be no special deal for the UK. never was the slightest chance of it.
The practicalities of getting a judgment through the UK's Supreme Court and the ECJ are that neither are super-fast,
didnt the ECJ say it would fast track any such referral? A matter of a few weeks, I would think. i'm sure the government law officer could arrange for any case in UK courts to be heard at once.
In the last analysis parliament is supreme. if it chooses and doesnt like the government deal it could pass a short act in one day authorising someone to negotiate on behalf of the UK and preventing the government from interfering. that is the wonderful thing about an unwritten constitution. It can be changed instantly. (havnt you lauded it in the past?)
Aside from revoking notice to quit, the EU could simply extend the negotiating time limit. Either indefinitely so it never expires and the Uk never leaves, or for 5 years , or until treaty renegotiation, or some other convenient point when the treaties could be amended for whatever solution everyone wants. There is absolutely no need for the UK to leave.