UK Supreme Court confirms the enduring relevance of mandatory State Immunity Act (SIA) diplomatic service requirements

On 25 June 2021, the UK Supreme Court handed down judgment in General Dynamics v Libya [2021] UKSC 22.

In short, the majority held that – without exception – proceedings for the enforcement of arbitral awards against foreign states must be served on the relevant State’s Ministry of Foreign Affairs through the U.K. Foreign, Commonwealth and Development Office.