Diplomatic relations — Immunity from jurisdiction — Criminal jurisdiction — Whether former Head of State entitled to immunity — Immunity for members of Special Missions — Customary international law — Convention on Special Missions, 1969, Article 31

State immunity — Head of State immunity — Criminal proceedings — Whether former Head of State entitled to immunity — Allegations of conduct amounting to torture — Criminal Justice Act 1988, Section 134 — Whether elements of offence alleged made out by conduct alleged — State immunity ratione materiae — Duty of States to notify other interested States of intention to claim immunity

Relationship of international law and municipal law — Exercise of extraterritorial jurisdiction — Required nexus for private prosecution — Criminal responsibility for acts of torture — Criminal Justice Act 1988 — The law of England