On 13, 17 and 18 October, the High Court considered whether it would be unlawful for the Secretary of State for Exiting the European Union to notify the European Council of the UK's decision to leave under Article 50(2) Treaty on European Union without an assenting Act of Parliament.

The government's argument was focussed on its belief that it is able to use royal prerogative power to effect the June referendum result, thereby circumventing parliamentary approval for Brexit.

We now await a judgment from the court. However, whatever the result, it is likely that the decision will be appealed. In that instance, it is likely that there will be a `leapfrog' appeal directly to the Supreme Court, skipping the Court of Appeal, due to the general public importance of the issue.