Sir Winston Churchill and the 1960s Ultra Security Breach

In 1960 the Joint Intelligence Committee found itself with an unexpected problem. Among the challenges of the Cold War and attempting to predict what the Soviet Union may attempt next, it was also identified that the content of some of Sir Winston Churchills papers, then under transfer to the Archives was potentially about to cause a major diplomatic incident with the USA. This led to urgent ‘action this day’ to resolve the matter. This is the previously untold story of the Churchill papers. Like many leaders, Churchill accrued a significant amount of files governing his personal life, as well as records of his time in public office. To this day they remain accessible via the ‘ Churchill Archives’ which stores thousands of papers linked to his time in public office including as Prime Minister during the 2 nd World War (known as the ‘Chartwell Papers’) and also the later period of his life after July 1945 (known as the ‘Churchill Papers’). The Chartwell Pa...