Aidan O'Neill

'''Aidan O'Neill''' KC (born 1961) is a Scottish advocate, barrister, and King's Counsel.

He has pleaded almost thirty times before the Supreme Court of the United Kingdom and House of Lords, as well before the Court of Justice of the European Union and the European Court of Human Rights.

He appeared for Joanna Cherry MP before the Supreme Court of the United Kingdom in the September 2019 case relating to the prorogation of Parliament. Provided by Wikipedia