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Practice Summary

Jeffery Onions undertakes a wide range of complex commercial and company law disputes work both as an advocate and in an advisory context. He has particular expertise in banking and finance, company and insolvency, commercial litigation, civil fraud, energy/oil and gas, insurance and reinsurance, shareholder disputes and sport/media-related cases. He is equally at home in arbitration proceedings, as he is in High Court litigation. He also accepts appointments as an arbitrator and expert.

"He has formidable techincal knowledge and is a demon cross-examiner." "He's fantastically hands-on for such a senior leading counsel." Chambers and Partners UK 2017 - Commercial Dispute Resolution

"Phenomenally intelligent yet client-friendly." "He's a very good cross examiner and very hard-working." Chambers UK 2017 - Energy & Natural Resources

"Has formidable technical knowledge and is a demon cross-examiner". "A heavyweight advocate with real clarity of argument and courtroom presence". Chambers UK 2016

'A highly regarded silk whom sources identify as "a natural advocate" and "a man for the most difficult cases." '  Chambers UK 2015

"Fantastically hands-on for such a senior leading counsel."   Chambers UK 2015

‘Jeffery Onions QC "drills down to the essence underlying a case and distils it for judges." ‘ Chambers & Partners 2013

‘Jeffery Onions QC "does an excellent job," and is an ideal choice for those seeking an adviser or advocate for complicated commercial matters.' Chambers & Partners 2013

Recent cases include:

  • Acting for Lyca in Lebara Mobile Ltd v Lycamobile UK Ltd [2015] EWHC 3318 (Ch) in successfully defending injunction proceedings alleging numerous causes of action under English and certain EC laws. Under English Lebara alleged, in particular, conspiracy to injure, interference with its business by unlawful means, unlawful means conspiracy and a direct claim under the Privacy and Electronic Communications (EC Directive) Regulations 2003.
  • Acting for Network Rail Infastructure v Handy [2015] EWHC 1175 TCC, in test cases relating to claims against third parties for damage to the rail infrastructure and the effect of the Track Access Agreement with Train Operating Companies.
  • Acting for the successful defendant in Al Gaood v Innospec [2014] EWHC 3147 Comm. A substantial unlawful means conspiracy involving allegations of bribery.
  • Acting for IBM in IBM v Fujitsu [2014] EWHC 752, a substantial computer contract dispute raising issues as to the construction and effect of exemption clauses.
  • Advising on claims arising from the LIBOR scandal and on cases involving hedge funds in relation to derivatives (including the construction and effect of the ISDA terms) and other credit instrument and in a substantial contractual dispute relating to the termination of outsourcing; and appearing in Court of Appeal hearings relating to contractual interpretation in the context of loan agreements and of articles of association/pre-emption rights.

Other significant and reported cases in specific practice areas are detailed in the full CV.