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Gailani, Yasseen
Direct Tel: +44 20 7653 2021
Tel: +44 20 7653 2000 Fax: +44 20 7653 2100

Yasseen is a partner in the London office who focuses on complex, high value commercial litigation and arbitration matters in the banking, finance, financial services, restructuring and insolvency and civil fraud spaces. He also has significant experience in a wide array of other practice areas and sectors, including white collar, sanctions, investor-state disputes, insurance, property, M&A, private equity, private debt, telecoms, aviation, oil and gas, and metals. For the last three years, Yasseen has been named as a “Next Generation Partner” in The Legal 500, and is praised by his clients as “a truly outstanding lawyer” with a “natural, fierce intellect” whose work is “always first class”.

Yasseen originally joined the firm in 2011. In that time, he has worked on numerous multi-billion dollar claims, and has particular expertise in disputes arising out of or relating to securitisations, derivatives and structured financial products, the manipulation of benchmarks, conduct breaches by financial institutions (including mis-selling), the Eurobond markets, shareholder disputes and directors’ duties. His practice includes advising insolvency practitioners and other office holders in high net worth personal and corporate insolvency matters, alternative investment managers on event driven investment strategies, and multi-national corporates on issues of public and private international law, including sovereign immunity and jurisdiction. In recent years Yasseen has also developed significant experience in disputes relating to high value classic and prestige cars and bikes (including disputes relating to title and provenance), as well as audit negligence.

  • The Federal Deposit Insurance Corporation
  • PCP Capital Partners
  • M&G
  • AIG
  • Alvarez & Marsal
  • BDO
  • Cork Gully
  • Caius Capital
  • Signal Capital
  • Beach Point Capital Management
  • Pollen Street Capital
  • Acting for a private equity firm in claims arising from alleged fraudulent misrepresentations made by Barclays Bank PLC during Barclays’ £7.0 billion capital raising from Middle Eastern investors in October and November 2008.
  • Acting for five UK institutional investors in the RBS Rights Issue Litigation.
  • Advising on multiple litigation and arbitration proceedings in England, France, Ghana, Sudan and other African and Middle East jurisdictions following a major emerging market telecoms acquisition, together with advice regarding alleged breaches of applicable anti-bribery and corruption laws.
  • Acting for a U.S. government agency in High Court proceedings to recover losses suffered by 39 failed U.S. banks as a result of the alleged suppression of USD LIBOR during the financial crisis.
  • Gonville and Caius College, University of Cambridge
    (M.A., Honours, Law, 2005)
  • New York University School of Law
    (LL.M., 2006)
  • Solicitor, England and Wales
  • Solicitor Advocate, England and Wales
  • French
  • German
  • Dewey & LeBoeuf:
    • Associate, 2009-2011
    • Trainee Solicitor, 2007-2009
  • Weil, Gotshal & Manges:
    • Senior Associate, 2014-2016


  • Ranked by Lawdragon 500 Global Plaintiff Lawyers for Financial Litigation, Inc. Plaintiff (2024)
  • Ranked as “Future Leaders” by Who's Who Legal for Commercial Litigation (2024)
  • Ranked as a “Next Generation Partner” by Legal 500 UK for Banking Litigation: Investment & Retail (2024)
  • Ranked as “Recommended Individual” by Legal 500 UK for Corporate Restructuring & Insolvency (2024)
  • Listed by Legal 500 UK as a “Next Generation Partner” for Commercial Litigation (2021-2024)
  • Ranked by Lawdragon 500 Leading Global Litigators Guide for International Litigation, Arbitration, Investigations (2023)
  • Named a “Rising Star” in Commercial Litigation by Legal 500 UK (2020)
  • Third Prize, The Times Law Awards Essay Competition (2004)
  • Honorary Senior Exhibition, Gonville & Caius College (2005)
  • Characterising claims by foreign tax authorities (Skatteforvaltningen v Solo Capital Partners LLP) [2022] EWCA Civ 234, LexisPSL, 03/03/2022.
  • Locating harmful event in EU prospectus liability claims (Löber v Barclays Bank plc, EU Court of Justice Case C-304/17), LexisNexis Dispute Resolution Analysis, 17/09/2018.
  • Dishonesty coming home to roost: UBS v KWL (2018) Butterworths Journal of International Banking and Financial Law.
  • Rules of Law Which Are Derogable for the Purposes of Art 3(3) of the Rome Convention: Banco Santander Totta SA v. Companhia Carris de Ferro de Lisboa SA and Ors (2017) Butterworths Journal of International Banking and Financial Law.
  • Winning away from home: UBS AG v Kommunale Wasserwerke Leipzig (2015) 4 JIBFL 218.
  • Expert evidence to support or challenge Loss calculations: how credible is it? (2015) 9 JIBFL 583B.
  • ABN AMRO Bank NV v Bathurst Regional Council: Rating Agencies' Duty of Care to Investors, Caplaw 2014-25.
  • When Countries Go Bust, European Lawyer (2011) 109 Euro Law 38.
  • In Defence Of Human Rights: An Evaluation Of The Decision Of The House of Lords in the Case of the Belmarsh Detainees, (2005) 1 Cambridge Student Law Review 39.
  • Member, Association of Business Recovery Professionals