Editorial Board members have written essays that contextualize the primary source material and which highlight key themes, topics, and events discussed within and across the files. Subjects include: the role of signals intelligence in key Allied operations during the Second World War; the role and influence of intelligence in shaping British policy; the function of the Joint Intelligence Committee; and British Defense Policy in the early Cold War.
- Secret Intelligence and British policy, 1909–45 by Gill Bennett, Foreign and Commonwealth Office, London, U.K.
- The Origins, Wartime Experiences, and Postwar Nature of the Joint Intelligence Committee by Michael Goodman, King's College London, U.K.
- British Defense Policy and the Atomic Bomb at the Dawn of the Cold War, 1945–52 by Matthew Jones, London School of Economics and Political Science, U.K.