Simon Olleson
UK Bar Guide 2025
Band 1 : Public International Law
Band 1
About
Provided by Simon Olleson
Practice Areas
Simon’s practice focuses on public international law and international arbitration (including both investment protection disputes and international commercial arbitration). He has particular experience as counsel and advocate in inter-State disputes, including before the International Court of Justice (ICJ), the International Tribunal for the Law of the Sea (ITLOS) and international arbitral tribunals constituted under the auspices of the Permanent Court of Arbitration (PCA).
Chambers Review
UK Bar
Simon Olleson has a strong academic background in PIL and a keen interest in the law of state responsibility. He has recently advised on the PIL angles of environmental disputes and shown himself to be an expert in maritime delimitation cases and BIT arbitration. He has acted in ICJ, PCA, ICSID and ad hoc arbitration proceedings.
Strengths
Provided by Chambers
"Simon has serious legal horsepower. He is a silk in waiting and a consummate modern counsel. His drafting and advocacy is stylish."
"Simon is a very knowledgeable public international lawyer."
"Simon has serious legal horsepower. He is a silk in waiting and a consummate modern counsel. His drafting and advocacy is stylish."
"Simon is a very knowledgeable public international lawyer."
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