Prorogation case: The UK Supreme Court hearing - as it happened - BBC News
The Supreme Court has heard three days of argument over whether Boris Johnson acted lawfully in suspending Parliament.
BBC legal correspondent Clive Coleman says the case has "stress-tested" our unwritten constitution "to the very limit".

"If we had a written constitution that said 'two weeks proroguing is fine but five weeks isn't' we wouldn't be here today

"I think it's shown, really, the tectonic plates of the constitution grinding up against each other", he says.

But, he adds, it all comes down to the decision of 11 people - the Supreme Court justices.

"We're in fascinating territory because if they do declare the PM has acted unlawfully then we really have to look at the nature of that declaration to see where things go from there.

Whether its a case of MPs simply filing back in at the invitation of the Speaker, or whether that has to be activated by the government - quite how that is all going to shake down remains to be seen.