The Supreme Court has spoken -

.. On 24 January 2017, the Supreme Court, the UK’s highest court, ruled that Parliament must be consulted before Article 50 is triggered. Article 50 is the provision of the Treaty of the European Union which a member state must invoke in order to formally give notice of its intention to leave the EU and begin the two-year withdrawal process.

.. The Supreme Court’s judgment represents a loss for the UK Government which was defending the claim. This creates new issues for Prime Minister, Theresa May, including how to uphold the pledge to trigger Article 50 by the end of March 2017...