Government Communications Headquarters (GCHQ) - Intelligence gathering agency that is charged with helping safeguard the nation's security, economic well-being and to protect it against serious crime.
National Criminal Intelligence Service - Agency with law enforcement power aims to combat the top echelons of crime and seeks the ultimate arrest or disruption of major criminals in the U.K.
Research Study Group - Studies Britain's Cold War defences: secret bunkers, early warning systems, plans and propaganda.
