For example: David acted on behalf of Amnesty International intervening in the House of Lords in General Pinochet Extradition (see R v Bow Street Magistrates ex parte Pinochet Ugarte (No. 2)[2000] 1 AC 119 (House of Lords): challenge to House of Lords decision on the ground of bias alleged against Lord Hoffman; and see R v Bow Street Magistrates ex parte Pinochet Ugarte (No. 3)[2000] 1 AC 147 (House of Lords):
whether former head of state enjoyed immunity.)