Peter Calvocoressi, who died on 5 February, 2010, was a British intelligence officer who worked at Bletchley Park during the Second World War.

As well as overseeing efforts to crack German ciphers at Bletchley, he was also involved in the gathering of evidence for the Nuremberg trials.

After five years at the Royal Institute for Foreign Affairs, he went into publishing at Chatto and Windus, Hogarth Press and eventually Penguin where he was editor-in-chief. He also had a spell teaching International Relations at Sussex University.

He wrote 20 books, including several volumes of political history and an autobiography, Threading My Way (1994).