The term Combined Services Detailed Interrogation Centre (CSDIC) was used for facilities in the UK, the continent (Belgium and Germany) between 1942 and 1947, the Middle East, and South Asia. They were run by the British War Office on a joint basis involving the British Army and various intelligence agencies, notably MI5 and MI9. The CSDICs on the European mainland were:
They were originally established to interrogate detainees, defectors, and prisoners of war who were known or suspected to be working for Nazi Germany and Japan. After the war, suspected Soviet agents were also held for interrogation. The last CSDIC facility, the Bad Nenndorf interrogation centre, was closed down in June 1947. CSDIC(I) X and Z Sections were closed on 30 November 1945.