On Wendesday morning, the court ruled that the Prime Minister’s suspension of Parliament was unlawful.
It will be seen as a major win for Remainers plotting to derail the Prime Minister’s Brexit Strategy.
The battle was led by Lib dem leader Jo Swinson and SNP MP Joanna Cherry.
Ms Cherry tweeted: “Huge thanks to all our supporters and our fantastic legal team who have achieved the historic ruling that #prorogation is #unlawful.”
The Court of Session in Edinburgh heard the full arguments against Boris Johnson’s controversial decision to suspend Parliament.
The case was originally dismissed last week, where Judge Lord Doherty said it was for politicians and not the courts to decide on shutting down the Commons and Lords for five weeks.
But three judges disagreed with Lord Doherty’s ruling and overturned the ruling at the Inner House supreme civil court on Wednesday.
The group of Remainer MPs sought a ruling that Mr Johnson’s suspension of Parliament is illegal – and it seems they have triumphed in Scotland’s highest court.
The Queen granted Mr Johnson request to suspend Parliament until October 14.
Lib Dem leader Jo Swinson and SNP member Joanna Cherry led the group of 75 MPs – and first went to the Court of Session in August of this year.
Jo Maugham, a lawyer involved in the case, said an appeal to the Supreme Court – the highest judicial body in the UK – would begin on Tuesday.
He tweeted: “We believe that the effect of the decision is that Parliament is no longer prorogued.”
This is a breaking story. More to follow…