R (on the application of the Freedom and Justice Party and others) v Secretary of State for Foreign and Commonwealth Affairs and another [2016] EWHC 2010 (Admin), [2016] All ER (D) 32 (Aug)
The Divisional Court held that it was appropriate to grant declarations that: (i) customary international law required a receiving state to secure, for the duration of a special mission, personal inviolability and immunity from criminal jurisdiction for the members of the mission accepted as such by the receiving state; and (ii) that rule of customary international law was given effect by the common law.