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Who's Who Legal
Who's Who Legal

Global Leader

Competition - State Aid 2021

Professional Biography

WWL Ranking: Recommended

Peers and clients say:

"He is a great lawyer, unbeatable in state aid matters"
"Conor possesses a strong reputation as the leading state aid QC in the UK"
"He has an amazing brain"
"There is no doubt he is a state aid guru"


Conor Quigley QC of Serle Court, a leading barristers chambers in London, is widely recognised for his outstanding expertise in EU State aid and UK subsidies law.  He is the author of the leading textbook EU State Aid Law and Policy (Hart/Bloomsbury, 3rd edition 2015).  He is a Visiting Research Fellow at Oxford University’s Institute of European and Comparative Law and a Visiting Fellow at King’s College, London. 

Conor is particularly experienced in fiscal State aid, i.e. the interaction between corporate taxation and State aid.  He has advised governments, multinational groups and all the Big 4 accountancy firms on fiscal State aid issues, in particular those involving tax rulings, advance pricing agreements, CFCs, double taxation agreements and other matters that are currently under investigation by the European Commission and Courts.  He is counsel for several multinational groups in a number of cases pending before the EU General Court challenging Commission decisions, including the non-taxation of royalty income in Gibraltar and the Group Financing Exemption for UK CFC’s.  He has also written widely in various tax publications on fiscal State aid, including a chapter in Taxation Implications of Brexit (Bloomsbury, 2021, ed. Saccardo).

Conor is listed as an arbitrator in the Shanghai International Arbitration Centre and has been an ad hoc arbitrator appointed by IATA.  He frequently acts as an expert witness on State aid issues in international arbitrations. 

Conor also accepts instructions on competition, procurement and international trade law.  He is general editor of Hong Kong Competition Law (Hart/Bloomsbury, 2016) (which was praised in an ECLR review as having the status of an instant classic). 

National Leader

WWL Ranking: Recommended
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