Mathew O'Reagan

Year of Call: 2015

Inn: Middle Temple

Solicitor: 1997

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Combines an in-depth understanding of competition law with a hugely pragmatic and commercial approach to cases.”

Legal 500,  2021
Commercial Litigation

Matthew, a former Solicitor, is a specialist competition and regulatory lawyer. He was Called to the Bar and joined St John’s Chambers in 2015, having previously been a Partner in the Competition Group of Burges Salmon LLP. He has a strong international perspective, having practised for over a decade in the Brussels office of Freshfields Bruckhaus Deringer LLP.

Matthew has a broad-based practice, with extensive experience in all aspects of competition law, EU law, State aid, public procurement and economic regulation, including competition disputes, regulatory investigations, transactional matters and advisory work. He combines his technical expertise and experience to provide pragmatic, commercially-focused and solution-oriented strategic advice and representation.

Matthew acts as an advocate in competition-related proceedings (including disputes, appeals and judicial reviews) in the UK and EU courts. He also represents and advises clients in all types of competition and regulatory investigations including in cartel, dominance and other investigations by the Competition and Markets Authority, other UK regulatory authorities and the European Commission. He advises clients on UK, EU and international merger control proceedings, the application of the State aid and procurement rules, and the application of competition law to a wide range of transactions, commercial agreements and business practices.

He has broad sector experience, advising clients from numerous sectors, including: oil and gas, energy, nuclear, transport, airports and aviation, aerospace and defence, chemicals, telecommunications and media, financial services, consumer and sports goods, food and drink, aluminium, mining and natural resources, packaging, sport, private equity and retail and wholesale distribution.

Matthew accepts instructions from solicitors, overseas lawyers and in-house legal departments on all types of matters. He also assists solicitors firms, whether by providing an additional resource to those with established competition practices, including during dawn raids, or by assisting those firms without their own competition law capability.

He is also an Editor of the Competition Law Journal (published by Edward Elgar Publishing) and a regular contributor to the Kluwer Competition Law Blog.

Professional memberships:

  • The Honourable Society of the Middle Temple
  • Member of the Brussels Bar (E-list) 2001 – 2011
  • UK State Aid Law Association
  • Competition Law Association
  • Bar European Group
  • Procurement Law Association

Qualifications & awards:

  • LLB (Hons.) (Nottingham) first class
  • LLM (Amsterdam)
  • Diploma in Legal Practice (Nottingham Trent)
  • Admitted as a Solicitor 1997
  • Solicitor-Advocate Higher Courts Civil Proceedings 2014
  • University of Nottingham Exhibition 1991
  • Reuben C Lipman Scholarship 1992

Additional information:

Matthew is qualified to undertake public access work in appropriate cases, for further information, please visit our Public Access page.

In 2017, Matthew was appointed to the Welsh National Procurement Services Panel for Legal Services, for Administrative Law, International & European Law and Procurement Law.