Jon Tweedale

Expertise

Jon Tweedale is a partner in the London office and Co-Head of the International Arbitration Practice.

Jon has over 22 years' experience advising on international commercial disputes and has acted as Counsel for multinationals, banks and governments in international arbitrations under most arbitral rules, including arbitrations under the LCIA, ICC, ICSID and UNCITRAL rules seated in London, Paris and Vienna.  He is recognised as a leading individual in international arbitration by Lexology (in association with Global Arbitration Review) (2025) and Chambers & Partners (UK) (2025).

Jon is also a Solicitor-Advocate (Civil Proceedings) of the Supreme Court of England and Wales and has substantial experience advising on proceedings in the Commercial Court in London.

Sectors and industries in which he has particular knowledge and experience include energy (oil, gas and renewables), life sciences (pharma and biopharma, including gene therapy programmes), manufacturing and engineering, banking and finance, retail, hospitality and professional services.

Jon represented BP in the first case brought to trial under the Shorter Trials Scheme (a pilot scheme in the English Commercial Court), in which a US$70 million claim against BP was successfully defeated in the Court of Appeal.  More recently, he represented INEOS in a Commercial Court case which provided important guidance on the exercise of a contractual discretion to withhold consent in the context of a commercial contract (Apache North Sea Limited -v- INEOS FPS Limited [2020] EWHC 2081 (Comm)).

Jon studied law at Downing College, Cambridge University, before training and practising as a solicitor in the international arbitration and commercial litigation practice of Allen & Overy LLP (London office) for over 10 years. 

As well as maintaining his practice as Counsel, Jon sits as an arbitrator.

Jon's experience includes:

• Representing the Islamic Republic of Pakistan, successfully defending an investment treaty claim under the OIC Treaty seeking damages in excess of US$420m.
• Representing the Libyan NOC defending a US$1 billion claim relating to the development of an oil field in North Africa (ICC rules, Paris seat).
• Representing an oil supermajor in a joint venture dispute relating to its logistics operations in North Africa (ICC rules, London seat).
• Representing an oil supermajor in an arbitration arising from an M&A business disposal in Southern Africa (LCIA rules, London seat).
• Sitting as Arbitrator in a major ICC arbitration arising from a multi-billion dollar M&A transaction in the oil and gas sector in Latin America.