In June 1215 King John put his seal to Magna Carta, which over the centuries has become an icon of English (British) liberties. Clause 40 about not selling, denying or delaying justice, and Clause 39, that no free man is to be imprisoned or dispossessed “save by the lawful judgment of his peers or by the law of the land” are still in force today. For these reasons Lord Denning described Magna Carta as “the greatest constitutional document of all times—the foundation of the freedom of the individual against the arbitrary authority of the despot”. In other words the executive can never be above the law, but for this principle to be enforced the state must disclose evidence by due process to the public by which it can be held to account. This ...