Conor Quigley QC practices law from Serle Court Chambers, one of London’s leading commercial barristers’ chambers. He specializes in European Union law, in particular concerning competition, commercial, trade, and tax law.

Conor is widely regarded as the leading expert at the English Bar in the law of EU state aid and subsidies control. He is the author of the leading textbook, European State Aid Law and Policy, now in its 3rd edition (2015) and is also co-author and general editor (with Suzanne Rab) of Hong Kong Competition Law (2016), (both books available from He regularly advises UK governmental and public authorities, major multinational groups, and other interested parties. Conor has acted in some of the leading EU law cases over the last 30 years before the European Court of Justice, the UK Supreme Court and Court of Appeal and High Court.

Conor accepts appointment as arbitrator in international disputes, in particular concerning international trade, state aid and subsidies, competition law and environmental issues.

In 1991 Conor became a member of the Law Faculty of the University of Oxford when he was appointed a Fellow in EU Law at Lady Margaret Hall. Since 2008, he has been a Visiting Research Fellow at the Institute of European and Comparative Law. He has also held visiting posts at the College of Europe, King’s College London and the International Tax Centre, Leiden.