Parliament must vote on whether the UK can start the process of leaving the EU, the High Court has ruled.
This means the government cannot trigger Article 50 of the Lisbon Treaty - beginning formal exit negotiations with the EU - on its own.
Theresa May says the referendum - and existing ministerial powers - mean MPs do not need to vote, but campaigners called this unconstitutional.
The government is appealing, with a further hearing expected next month.
- Rolling reaction to Article 50 court ruling
- Kuenssberg: Will this mean early election?
- The High Court's judgement in full
- Brexit: All you need to know
A statement is to be made to MPs on Monday but the prime minister's official spokesman said the government had "no intention of letting" the judgement "derail Article 50 or the timetable we have set out. We are determined to continue with our plan".
Plebiscites only count when plebes vote the way they're told.
(Score: 1, Informative) by Anonymous Coward on Friday November 04 2016, @05:43PM
Why? Too many syllables? I can assure you, most people to the east of the Atlantic have no problems understanding those terms -- and if they didn't, you wouldn't want to have a discussion with them about it anyway, so why do you choose definitions that are completely irrelevant to your audience? Regardless of what your wishes are, the GP is correct: China, Russia, Turkey and Cuba are all republics. That says nothing about how they're actually governed. Similarly, the UK, Spain, Netherlands and Thailand are monarchies instead of republics. Again, that says nothing about the impact and availability of ballot boxes in those countries.