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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 international arbitration . He also accepts appointments as an arbitrator and expert.

Recent cases include: 

  • Acting in an ongoing international arbitration (ICC)  involving Chinese investments in foreign based funds involving issues of contractual construction, rectification, foreign law and fraud.
  • Acting for the claimant in a substantial fraud claim in relation to Kazakhstan assets raising issues of Kazakh law, jurisdiction and proper law.
  • Acting for excess insurers in a confidential dispute relating to costs coverage issues.
  • Advising on issues related to the quantum of damage arising from an international arbitration relating to substantial shipbuilding contract and fraud/bribery related claims.
  • Acting in and confidential dispute involving a major infrastructure provider in relation to issues arising with the entities using the infrastructure, dealing with claims by those entities and advising on strategies to avoid and minimise claims.
  • Acting in a substantial arbitration involving private equity funds and the purchase of telecom towers in Africa.
  • Advising on contractual construction issues arising from a a joint venture agreement and a substantial procurement exercise.
  • Advising an electricity provider on claims arising from damage to the provider’s infrastructure.

Current directory recommendations:

"His analysis is extremely thorough and detailed, he's aware of the commercial drivers for the client, and he thinks about the problem in the round." "He gets stuck in, and he's a heavyweight who is very good on technical points."  Commercial Disputes Resolution, Chambers UK 2020

"A huge support to the team throughout and his analysis was extremely forensic."  Commercial Litigation, Legal 500 UK 2019-2020

"He is phenomenally intelligent yet client-friendly." "He is always willing to take time to bring people up to speed and is good at handling clients." "He is steeped in the oil and gas industry."  Energy & Natural Resources, Chambers UK 2020 

Other directory recommendations; 

"A formidable opponent – he has a tremendously impressive ability to master complex facts to distil high-quality legal advice.", ‘Extremely client friendly and quick-minded.’, ‘A class act on his feet, very good on the detail and a super cross-examiner.’, "He is incredibly hands-on and user-friendly for a very senior counsel, and his ability to synthesise arguments and present them effectively is very impressive." "He is a very thorough, very courteous and utterly reliable advocate.", "A real authority with years of experience; there's nothing he doesn't know. In court he has real presence and is a great cross-examiner.", "Has formidable technical knowledge, and is a demon cross-examiner." "He rolls up his sleeves and gets completely stuck in.", "He rolls up his sleeves and gets completely stuck in - he is consummately flexible and so immersed in his subject." "He is steeped in the oil and gas industry." "Phenomenally intelligent and very client-friendly.", "He's fantastically hands-on for such a senior leading counsel.", "Phenomenally intelligent yet client-friendly." "He's a very good cross examiner and very hard-working.", "A heavyweight advocate with real clarity of argument and courtroom presence". 

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