Brexit: Scottish judges rule Parliament suspension is unlawful
A panel of three judges at the Court of Session found in favour of a cross-party group of politicians who were challenging the prime minister's move.
The judges said the PM was attempting to prevent Parliament holding the government to account ahead of Brexit .
The UK government said it will appeal against the ruling to the Supreme Court in London.
The Court of Session decision overturns an earlier ruling from the court, which said last week that Mr Johnson had not broken the law.
It is currently unclear what impact the judgement will have on the current five week suspension of Parliament, a process known as proroguing, which started in the early hours of Tuesday.