Chambers Research is conducted by 200 Research Analysts, across 200 jurisdictions and provides nearly 6,000 rankings tables. Annually we collect hundreds of thousands of responses from clients, the majority via in-depth interview. Learn more about our methodology.
Regularly acts on significant commercial arbitrations and complex investor-state claims, fielding a strong bench of experienced practitioners in both. Attracts a variety of clients in the telecommunications, financial services and energy sectors, as well as governments. Experienced in handling a wide range of contentious matters, including disputes arising out of joint ventures, infrastructure projects, insurance agreements and commercial contracts. Handles arbitrations before leading arbitral institutions as well as ad hoc disputes.
Sources praise the team's "high-quality and strong arbitration practice."
Acted for Yukos Capital in a USD6.24 billion UNCITRAL investment treaty case against the Russian Federation. The dispute was brought under the ECT and was seated in The Hague.
Cyrus Benson is respected for his experience in international arbitration, with notable expertise in acting for Russian and African clients in big-ticket disputes. He regularly handles claims brought against sovereign states under the auspices of ICSID and UNCITRAL.
"He is an excellent lawyer and very commercial in the way he delivers his advice."
Jeffrey Sullivan QC is particularly known for his expert handling of claims brought under the ECT, which forms part of his extensive investor-state arbitration practice. He demonstrates strength across the energy and infrastructure sectors.
"He is an extremely focused, strong advocate who captures your attention. He's an impressive individual." "He's very easy to work with, has a succinct way of explaining complex things, and is very hard-working and calm under pressure."
Penny Madden QC is an impressive figure in the market with vast experience acting in complex commercial and investment treaty arbitrations. She fields significant international expertise, acting for clients across Europe, Africa and the Middle East.
"She is absolutely superb. She is no-nonsense, super smart and has excellent written advocacy skills."