William has extensive experience in a wide range of competition and regulatory matters.
He has acted on numerous high-profile merger cases before the UK and EU competition authorities. He has also been involved in several major cartel and other behavioural cases, including global antitrust investigations. In addition, he has significant experience in the field of competition litigation, including in appeals before the EU and UK courts.
Highlights include advising:
- Vodafone on various transactions, including its proposed joint venture with Three UK, and the mergers of its Dutch business with that of Liberty Global, and its Indian business with that of Idea
- Daily Mail on its acquisition of the ‘i’, the UK national newspaper, and its print joint venture with News UK
- Redrow on its combination with Barratt Developments
- Direct Line on its combination with Aviva
- Richemont on the potential combination of YOOX Net-a-Porter and Mytheresa, and on its global strategic partnership with Alibaba and Farfetch
- FNZ on its acquisition of GBST
- Diageo on its acquisition of Chase Distillery
- Deutsche Bank in the context of the multiple investigations into the setting of interbank offered benchmark rates and associated competition litigation
William is ranked by Chambers and the Legal 500 and is recognised as a ‘Global Elite Thought Leader’ by Who’s Who Legal: Competition. He was shortlisted in the ‘Lawyer of the Year – Under 40’ category in the Global Competition Review awards in 2019 and 2022 and for Dealmaker of the Year in 2024.
William is the contributing editor of the Legal 500 cartels guide and has published numerous articles on a wide range of competition matters.
William is based in London, but spends a significant amount of his time in Brussels. He is a member of the Brussels Bar (A list), as well as being qualified as a solicitor (England and Wales).
“William is a ‘keystone of London’s competition market’ and ‘one of the best in the field’." Who’s Who Legal
"He can connect his knowledge to the realities and make the authorities understand." Chambers UK
"He is the total package of being incredibly smart, very well-mannered and with strong strategic sense." Chambers Europe