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Will Thomas


Disputes, litigation and arbitration

... brilliant in the analysis of complex topics and in cross-examination …

Chambers UK, 2020

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About Will Thomas

Will specialises in international commercial arbitration, investment arbitration and public international law. He has particular expertise in the energy, telecoms and projects sectors, with a focus on disputes in the Middle East and Africa.

Will has acted as counsel and advocate in numerous institutional and ad hoc arbitral proceedings, including under ICC, LCIA, ICSID and UNCITRAL rules. He has also represented parties before both the International Court of Justice and the Iran-US Claims Tribunal. Alongside his disputes work, Will’s non-contentious practice includes advising on a wide variety of international law issues, as well as assisting clients with front-end risk management options on their international projects. Will’s clients include private multinationals, States and State entities.

Will was previously based in Paris, where he was head of the arbitration group of an international law firm. He continues to spend significant time in our Paris office.

Recent work

  • Acting for an oil and gas company in a $13 billion dispute arising under a long term gas supply agreement, ad hoc UNCITRAL arbitral proceedings.
  • Representing a Middle Eastern energy company in ICC arbitration proceedings concerning a $1 billion price revision dispute under a gas pipeline supply agreement.
  • Successfully defending an international telecoms company in a $600 million ICC arbitration arising under a shareholder agreement.
  • Successfully defending a Middle Eastern State in the first ever BIT case brought against it, concerning a GSM telecoms licence tender process.
  • Representing Iran before the Iran-US Claims Tribunal in the three remaining State to State proceedings: Cases B1, B61 and A15.



  • Solicitor - Advocate (Higher Courts Civil), England and Wales
  • MA, Cambridge University

Additional responsibilities

  • Regular conference speaker roles (including ICC, SIAC, IBRU, IFLOS).
  • Visiting lecturer at King’s College, London University and Sciences Po, Paris.

Blog posts