A file of meeting minutes and memoranda relating to a report by Sir Norman Brook into the state of the secret intelligence and security services. Amongst the subjects discussed in this file are divisions of responsibility between the intelligence services; the collection of signals intelligence from radio communications; the staffing and organisation of the intelligence services; ministerial oversight for the intelligence services; the need to research and develop special equipment for the interception of radio communications; the building of radio interception stations; and problems with maintaining the secrecy of the intelligence services, including suggested covers for the organisations and possible jobs for former staff members.