||County Information Officer (Name given to an Official CART researcher)
||Company. Military unit, typically consisting of 75-200 soldiers.
||Central Supply Depot
|Dead letter drops
||Used by civilian spies or couriers of the Special Duties Branch for leaving
messages which were picked up and distributed by runners.
||Division. Military unit, typically consisting of between 10,000 and 30,000
||Defence of Britain
Project. Volunteers of the DoB project recorded nearly 20,000 20th-century military
||Officer in the staff branch of military headquarters. G2 Branch was responsible
security and intelligence.
A GCO was in command of a group of Auxiliary Units operational patrols.
||General Headquarters. GHQ Auxiliary Units was based at Coleshill House, Wiltshire, from July 1940 to January
||General Headquarters Line. A defence line built in the UK during WW2 to contain an
expected German invasion.
||General Post Office
||Home Guard. A defence organisation of the British Army during WW2. Operational from
1940 until 1944, the HG comprised 1.5m local volunteers.
||INstations formed part of the wireless network commanded by Major RNA Jones of
Auxiliary Units Signals (GHQ Home Forces). They commonly
consisted of an
above-ground hut designed to look like a meteorological hut (for every day use) and a
concealed dugout (sometimes referred to as Zero-station) nearby, intended to be used
in the event of an invasion. Sometimes also referred to as Control stations, they
commonly housed two wireless sets, used to communicate with a number of
OUTstations within one particular network, as well as with neighbouring INstations.
The wireless sets were operated either by ATS or by Auxiliary Units Signals staff. See
||Imperial War Museum, Lambeth Road London SE1 6HZ
||Local Defence Volunteers. In July 1940, on the instructions of Prime Minister Winston
Churchill, the name was changed to Home Guard.
||Military Intelligence, Section 6 (see SIS), Based at Vauxhall Cross, London SE1
||Operational base. Dugout used by Auxiliary Units operational patrols and Scout
||Officer Cadet Training Unit
||Observation post. Lookout used by Auxiliary Units operational patrols and Scout
Sections (usually associated with an OB).
||OUTstations formed part of the wireless network commanded by Major RNA Jones of
Auxiliary Units Signals (GHQ Home Forces). Every OUTstation
consisted of a
wireless set operated by a civilian, providing the local INstation with the latest
intelligence. See also SDS.
||A group of Auxiliers recruited to operate clandestinely in their own
locality behind enemy lines. Each patrol had their own OB.
||The official name of this special reconnaissance unit, which was first formed in
was GHQ Liaison Regiment.
||Public Record Office (see TNA/The National Archives)
||Quartermaster. Officer responsible for stores and supplies.
||Royal Air Force
||Royal Army Service Corps. Now called the Royal Logistics Corps, the RASC was
responsible for supply and transport in the army.
||Royal Corps of Signals. Responsible for providing battlefield communications and
information systems essential to all operations. A number of RCS officers and other ranks served in
Auxiliary Units Signals, setting up and maintaining the secret wireless network.
||Royal Engineers. The Corps of Royal Engineers provides military engineering and other
technical support to the British Armed Forces. Special RE units assisted with the
construction and wiring of operational bases and IN-stations of the wireless network
||Royal Electrical & Mechanical Engineers. A British Army corps (formed in 1942)
responsible for the maintenance, servicing and inspection of electrical and mechanical
||Royal Observer Corps. A civil defence organisation operating between 29 Oct 1925 and
31 Dec 1995.
||Civilians used by Special Duties Branch for
picking up and distributing messages
deposited in dead letter drops. Also sometimes referred to as Couriers.
||Special Air Service. The SAS traces its origins to 1941 and WW2. It is has been a
regiment of the British Army since 31 May 1950, currently forming part of the United Kingdom
Special Forces (UKSF). A number of Auxiliers joined SAS after the threat of an invasion was no
||Special Duties Branch. Often called Special
Duties Section and abbreviated SDS, the organisation formed Part of GHQ Home Forces Auxiliary Units
and is always referred to as Special Duties Branch in original documents. (Not to be confused with
the Administrative and Special Duties Branches of the RAF.) The Special Duties Branch consisted of
civilians, both men and women, who were tasked with the gathering of intelligence by spying on and
observing enemy formations and troop movements. They would leave their reports in dead letter
drops. The Special Duties Branch also set up a wireless network intended to be used for the passing
of information. (See also ATS and Auxiliary Units Signals).
||Secret Intelligence Service. Commonly known as MI6 (Military Intelligence, Section 6),
the agency supplies the government with foreign intelligence. It operates under the formal
direction of the Joint Intelligence Committee (JIC) alongside the internal Security Service (MI5),
the Government Communications Headquarters (GCHQ) and the Defence Intelligence (DI).
||Special Operations Executive. Officially formed by the Minister of Economic Warfare,
Hugh Dalton, on 22 July 1940, to conduct espionage, sabotage and reconnaissance in occupied Europe
against the Axis powers, and to aid local resistance movements. It was initially also involved in
the formation of Auxiliary Units.
||Territorial Army. Voluntary reserve force of the British Army.
||The National Archives (formerly PRO/Public Records Office), Kew, Richmond, Surrey, TW9
||Wireless set used in INstations (see SDS).
||War Office. A department of the British Government, responsible for the administration
of the British Army between the 17th century and 1964, when its functions were transferred to the
Ministry of Defence.