Reign Lee is a UK-qualified solicitor, based in our London office, specialising in competition law as well as sanctions law.

Reign focuses on all aspects of UK and EU competition law, with a particular emphasis on horizontal and vertical agreements, merger control and market investigations. She works with clients on developing holistic compliance strategies and specialises in the interplay between competition law and other areas such as data protection law and consumer law. She also focuses on emerging issues, including digital markets regulation, sustainability agreements and subsidy control.

Reign’s experience includes conducting merger control and FDI assessments, advising third parties in EU antitrust investigations concerning Big Tech companies, and advising on complex distribution arrangements.

She also works in the UK Trade practice, providing guidance on compliance with EU and UK trade and financial sanctions.

Reign has particular expertise in the strategic management issues that businesses face. Her previous experience includes advising law firms and organisations on issues such as international strategy development, project management, policy design and implementation, market positioning, and internal strategy alignment.

Reign is globally certified as a Legal Project Practitioner with the International Institute of Legal Project Management. She has a certificate in M&A from Columbia Business School and a certificate in Hedge Fund Management from Henley Business School.

In addition to her legal role, Reign holds a management role as the Head of Strategy for Van Bael & Bellis. She also holds a compliance role in our London office’s Risk Management and Best Practice team.


  • English


  • University of Cumbria, LL.M. International Business Law
  • Bournemouth University, BA (Hons) Global Business Management
  • University of London, Diploma in Law


  • Principal author, UK chapter, Chambers Global Practice Guide: Merger Control (Chambers and Partners, 2023)
  • Co-author, Competition Briefing, Green agreements: competition law guidance on sustainability collaboration (Thomson Reuters Practical Law, 2023)

Bar admission

  • Solicitor, England and Wales

Notable assignments

Publications and insights

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