Georgios Petrochilos QCIlija Mitrev PenushliskiOscar Collins, and Blair Shepherd recently authored an article, “Beneath The Roubles: The Natural Gas Disputes Set To Emerge In Europe”, for Lawyer Monthly.

The article addresses Russian President Vladimir Putin’s decree requiring Gazprom to demand that buyers of Russian gas pay in Russian roubles and whether there is a lawful basis for Gazprom to suspend deliveries if buyers refuse to pay in roubles. They explore the responses by buyers, the European Commission’s stand as to whether this violates sanctions, and the impact on gas disputes.

To read the article, click here.


Georgios has a broad practice spanning more than two decades and covering inter-State, investment, and commercial disputes. He has represented States, international organisations, and private parties in more than 70 disputes, including several appearances in the International Court of Justice.

Georgios has published extensively, including the well-known monograph Procedural Law in International Arbitration, and the leading commentary, UNCITRAL Rules. He is recognised in Chambers and The Legal 500, and as a Thought Leader by Who’s Who Legal.


Ilija is counsel in the Paris office. He has represented clients in international arbitrations conducted under all major arbitration rules. His practice focuses on complex investment and commercial arbitrations, particularly in the energy sector. He has extensive experience with proceedings for the annulment and enforcement of arbitral awards in numerous jurisdictions.

Ilija is featured in Who’s Who Legal 2020, 2021 and 2022 – Arbitration as a Future Leader, which hails him as “one of the most outstanding legal minds of his generation”, someone who “knows the cases inside out”, and a “truly remarkable” arbitration lawyer who has “an impressive ability to manage very complex cases and to develop strategy”.


Oscar is an associate in the London office. He has experience in a number of significant investment treaty and commercial arbitrations conducted under a range of institutional rules, including ICC, LCIA, and ICSID. His experience spans a broad range of industry sectors, including oil and gas, construction, transport, and financial services. Oscar has acted on matters covering diverse geographic regions, including Central Asia, Eastern Europe, and the Middle East. Oscar is admitted in England & Wales.


Blair is an associate in the Paris office. He has experience in a variety of international commercial arbitrations under several institutional rules in industries including construction, energy, and port operations. He also has experience advising States and non-governmental organisations on matters of public international law, which is his primary academic focus, with an emphasis on human rights and national security. Blair has made numerous appearances in the New Zealand courts, including the High Court. His note, “Cutting Submarine Cables: The Legality of the Use of Force in Self-Defense” was recently published in the Duke Journal of Comparative & International Law, and he is a New Zealand contributor to the World Bank’s “Women, Business and the Law” reports.


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