Parliament must vote on whether the government can start the Brexit process, the Supreme Court has ruled.
During the Supreme Court hearing, campaigners argued that denying the UK Parliament a vote was undemocratic and a breach of long-standing constitutional principles.
What the court said
Reading out the judgement, Supreme Court President Lord Neuberger said: "By a majority of eight to three,
the Supreme Court today rules that the government cannot trigger Article 50 without an act of Parliament authorising it to do so."
Supreme Court ruling - key points
The 1972 Act that took the UK into the then EEC creates a process by which EU law becomes a source of UK law
So long as that act remains in force, it means that
EU law is an "independent and overriding source" of the UK's legal systemhttp://www.bbc.com/news/uk-politics-38720320