Relationship of international law and municipal law — Treaties — Washington Convention on the Settlement of Investment Disputes between States and Nationals of Other States, 1965 — Arbitration award by International Centre for Settlement of Investment Disputes tribunal — Application for annulment dismissed by ad hoc committee — Application for recognition and enforcement in national court — Whether State immunity engaged — Whether national court entitled to examine whether tribunal had jurisdiction — Whether there being distinction between recognition, enforcement and execution

State immunity — Jurisdictional immunity — Immunity from execution — Proceedings for recognition and enforcement of International Centre for Settlement of Investment Disputes arbitration award in national court — Whether engaging State immunity — United Kingdom State Immunity Act 1978, Sections 2 and 9

Economics, trade and finance — Investment disputes — International Centre for Settlement of Investment Disputes — Enforcement of awards — The law of England