Constitutional law – Diplomatic privilege. The Divisional Court had been correct to hold that a rule of customary international law had been identified which obliged a state to grant to the members of a special mission, which the state accepted and recognised as such, immunity from arrest or detention and from criminal proceedings for the duration of the special mission's visit. The Court of Appeal, Civil Division, in dismissing the claimants' appeal, further held that, in accordance with the presumption that customary international law should shape the common law, such immunities were recognised by the common law.