YUKOS CAPITAL LTD V THE RUSSIAN FEDERATION

[2026] EWHC 1918 (Comm), King's Bench Division, Commercial Court, His Honour Judge Pelling KC, 17 July 2026

Arbitration – Enforcement of Swiss award – Defence of sovereign immunity – Effect of Swiss judgment rejecting jurisdictional challenges to the award – Cause of action estoppel – Issue estoppel – Res judicata – Arbitration Act 1996, section 101

In July 2021 Yukos obtained an arbitration Award against Russia in a Swiss-seated arbitration, the Tribunal ruling that Russia was in breach of the Energy Charter Treaty 1994.