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Deirdre Lyons Le Croy is an associate in the firm's London office where she is active in the firm’s international trade controls, anti-corruption, white collar, dispute resolution, and Africa and Latin American practice groups.

Ms. Lyons Le Croy has advised clients in relation to compliance programs, internal investigations and enforcement actions concerning fraud and corruption, anti-money laundering, export controls and economic sanctions, and modern slavery. She has also supported clients in UK public inquiries, and in a range of dispute resolution matters (including follow-on disputes arising from non-compliance with applicable criminal and regulatory regimes).

  • Defended the outgoing CEO of a Russian transportation company in relation to allegations of bribery and sanctions breaches.
  • Advised a core participant in relation to The Grenfell Tower Inquiry, the UK’s independent public inquiry chaired by Sir Martin Moore-Bick.
  • Defended a trader charged of LIBOR manipulation by the U.S. Department of Justice.
  • Represented claimants in follow-on litigation in relation to the European Commission’s Air Cargo cartel decision against British Airways.
  • Advised a major London hedge fund manager in relation to a dispute involving allegations of fraud.
  • Advised a reinsurance company on its coverage obligations to D&O policyholders facing corruption allegations by the Office of the Comptroller General of the Republic of Colombia.
  • Advised a charity in an internal fraud investigation against its former CEO.
  • Advised an online advertising technology company bringing a fraud claim against its former directors.
  • Advised a large African company on developing and implementing its global compliance program, and providing advice on anti-corruption (in relation to the U.S. FCPA, UK Bribery Act 2010 and related anti-corruption laws), export controls, economic sanctions, modern slavery, and data privacy.

Pro Bono

  • Ms Lyons Le Croy acted as a member of a case team representing a Jamaican prisoner convicted of joint enterprise murder in Jamaica (Jogee & Ruddock, Supreme Court & Judicial Committee of the Privy Council 2016 [2016] UKSC 8, [2016] UKPC 7, [2016] 2 WLR 681). In one of the most significant developments in criminal law in recent years and an historic joint sitting, the Supreme Court and Privy Council unanimously allowed the conjoined challenges of Jogee and Ruddock, correcting a 30-year-old ‘error’ in the interpretation of the law.

Memberships and Affiliations

  • The Young Fraud Lawyers Association, Member and Contributing Author
  • Female Fraud Forum, Member
  • Anti-Fraud Network, Member and Contributing Author
  • Young Public International Law Group, Member

Previous Experience

  • Before qualifying as a lawyer, Ms Lyons Le Croy worked in the General Counsel Division of the Corporation of Lloyd’s of London, where she advised the Lloyd’s Market on matters relating to anti-corruption, anti-money laundering, and sanctions, with a particular emphasis on Africa and Latin America.
  • Ambassador, Wolfson College, University of Cambridge.
  • Firm-wide award for pro-bono appellate criminal litigation in the UK Supreme Court (at previous firm).