The case of Pinochet has aroused enormous interest, both political and legal. The spectacle of the General, whose regime sent so many to their deaths, himself under arrest and standing trial has stirred the hopes of the oppressed. His reversal of fortune, loss of liberty with a policeman, on the door, has been heralded by organisations for the protection of human rights as one small step on the long road to justice. For lawyers generally, the House of Lords' majority decision of 1998 that General Pinochet enjoyed no immunity signalled a shift from a State-centred order of things.1 It suggested that the process of restriction of State immunity, so effectively begun with the removal of commercial transactions from its protection, might now extend some way into the field of criminal proceedings. And it further posed the intriguing question whether an act categorised as within the exercise of sovereign power, so as to relieve the individual official of liability in civil proceedings, may at the same time, as well as subsequent to his retirement, attract parallel personal criminal liability.