Three judges ruled the Prime Minister does not have the right to use the Royal Prerogative to invoke the Article 50 notice to leave the EU without involving MPs and peers.
The extraordinary development throws into confusion whether Ms May cans tick to her timetable to trigger Article 50 by the end of March – and leave the EU by spring 2019.
If it leads to the Government being forced to push a Bill through Parliament, it suggests there is virtually no chance of that timetable being achieved.
The Government immediately confirmed it would challenge the ruling at the Supreme Court, with speculation the case could end up at the European Court of Justice.
Theresa May must get approval to trigger Article 50, High Court rules
03 November 2016
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Theresa May’s plans for triggering Brexit were plunged into chaos today by a sensational High Court judgment that she cannot bypass Parliament.
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