COMBINED SERVICES DETAILED INTERROGATION CENTRE IN THE UNITED KINGDOM. The three main Inter-Service Intelligence organisations which are responsible for policy to the Joint Intelligence Sub-Committee are the Inter-Services Topographical Department administered by the Navy, the Central Interpretation Unit administered by the Air Force, and the Combined Services Detailed Interrogation Centre administered by the Army. The following report is confined to the Combined Services Detailed Interrogation Centre in the United Kingdom which interrogates prisoners-of-war from the armed forces of the enemy only.