In The Kingdom of Spain v Infrastructure Services Luxembourg S.À.R.L. [2026] UKSC 9, the UK Supreme Court has confirmed that by becoming party to the ICSID Convention, a contracting state waives its immunity from the adjudicative jurisdiction of the courts of other contracting states for the purposes of recognising and enforcing ICSID awards. A respondent state cannot invoke the State Immunity Act 1978 (the SIA 1978) to block registration of an ICSID award in the English courts.
Our Directors, Jiaxiang Zhuo and Colin Liew, share their insights into this important decision here.
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