Boris Johnson's decision to suspend parliament for five weeks was has been ruled unlawful.
Eleven judges delivered their unanimous verdict this morning after a three-day hearing at the court in London, which came to a close last Thursday.
The hearing dealt with two appeals.
The first case was brought by businesswoman Gina Miller who appealed against the 's decision that prorogation was political and not a matter for the courts.
While the other case came from the government who were appealing against the ruling by the in Scotland.
The judgement at the court in Edinburgh concluded that suspension of parliament was "unlawful".
A group of cross-party MPs and peers led by the SNP's Joanna Cherry challenged the government in the Scottish courts.
The court cases comes after Boris Johnson advised the Queen to prorogue parliament for five weeks.
Westminster was then suspended on September 9 after the Queen signed the order on August 28.
The Tory primer minister says the five-week suspension is to allow his government to have a Queen's speech which will set out the new legislative agenda.
However, the legal challenge brought argued the prorogation would prevent MPs scrutinising the government ahead of the UK's exit from the EU on October 31.
