Brexit ruling: PM Theresa May can’t bypass MPs and peers to trigger Article 50

The court ruled, by a majority of eight to three, that British prime minister Theresa May cannot lawfully bypass MPs and House of Lords peers by using the royal prerogative to trigger Article 50 of the Lisbon Treaty to start the two-year process of negotiating the UK’s divorce from its EU partners.
Lord Neuberger, Lady Hale, Lord Mance, Lord Kerr, Lord Clarke, Lord Wilson, Lord Sumption and Lord Hodge rejected the government’s case, while Lord Reed, Lord Carnwath, and Lord Hughes dissented.
He declared: “By a majority of eight to three, the Supreme Court rules that the Government cannot trigger Article 50 without an Act of Parliament authorising it to do so.”
It is the formal mechanism which a nation state must trigger if it wishes to leave the EU.
“A Member State which decides to withdraw shall notify the European Council of its intention. In the light of the guidelines provided by the European Council, the Union shall negotiate and conclude an agreement with that State, setting out the arrangements for its withdrawal, taking account of the framework for its future relationship with the Union.
“That agreement shall be negotiated in accordance with Article 218(3) of the Treaty on the Functioning of the European Union. It shall be concluded on behalf of the Union by the Council, acting by a qualified majority, after obtaining the consent of the European Parliament.
“The Treaties shall cease to apply to the State in question from the date of entry into force of the withdrawal agreement or, failing that, two years after the notification referred to in paragraph 2, unless the European Council, in agreement with the Member State concerned, unanimously decides to extend this period.”
Because the British government appealed against a High Court ruling in November which blocked Ms May using the royal prerogative to launch Britain’s exit from the EU without parliament having a say.
The British parliament will debate and vote on invoking the measure.
No. It was a consultative plebiscite, though few people on either side mentioned that at the time.