John McElroy

John McElroy

  • Partner
  • London
he / him / his


John McElroy is a commercial dispute resolution expert. He has extensive experience dealing with complex and often high value commercial litigation and international arbitration matters, with a particular emphasis on complex financial services and contractual disputes. He was Head of the Commercial Disputes Team in London from January 2022 to June 2024.


John has acted in all divisions of the English High Court and his cases regularly involve international elements. He has been involved in LCIA, ICC, LME, LMAA, LCAM and ad hoc arbitrations - involving parties in various different jurisdictions - and in various ICSID arbitrations. He has also acted in cases before the Courts of the British Virgin Islands.

John is currently acting on a variety of commercial disputes ranging from High Court employment disputes to breach of warranty claims, insolvency disputes and international arbitrations. He has also acted on intellectual property, trusts, property and tax disputes. Arising out of the COVID-19 pandemic, he was instructed on matters involving issues such as force majeure and frustration.

John has twice been the partner responsible for the cases recognised by The Lawyer’s Top 20 Litigation of the year surveys. Back in 2016, John was the lead lawyer representing the successful claimants on the first case to reach a judgment in the London High Court’s new Financial List. He has also acted in regulatory investigations involving both the Financial Conduct Authority and the Securities and Exchange Commission.

Most recently, John has been instructed on disputes against entities such as Macquarie Bank, American Express and VivoPower plc.

John has been elected the vice president of the London Solicitors Litigation Association. John works with the president and other members to ensure that London remains a leading centre for dispute resolution by working with the London disputes lawyers as well as the judiciary and the government in advancing and promoting London as that centre.

Working towards a diverse, equitable and inclusive work force is paramount to John who is an active member of the firm’s DEI committee and chairs the firm’s global LGBTQ+ Alliance Working Group.


John’s diverse client base include major domestic and international companies including clients in the sports, travel and retail industries, as well as insolvency practitioners and individuals seeking to pursue their commercial interests.

He also has extensive experience of acting for and against groups of claimants, ranging from defending clients on claims being brought by groups of individuals, to advising groups of bondholders and institutional shareholders against major international banks and corporates.