Only those units which are integral to HQ Allied Rapid Reaction Corps (ARRC) or under operational command of Commander ARRC on a peace-time basis are actually committed to it. Most UK formations and units on which HQ ARRC might draw for operations are affiliated for training, doctrine development, communication and other purposes, but not permanently assigned to, or commanded by, HQ ARRC. The integral and affiliated HQ ARRC units are listed as follows.
Unit name
HQ ARRC Group
1 (UK) Signals Brigade (includes the ARRC Support Battalion)
12 (UK) Signals Group
Postal and Courier Support (99 Postal and Courier Squadron Royal Logistic Corps)
Operational Intelligence Support Group/UK National Intelligence Cell/12 Military Intelligence Company
Command and Liaison Flight (12 Fleet Army Air Corps)
Geographic Section (14 Geographic Squadron Royal Engineers)
(B) Affiliated To HO ARRC
ARRC Combat Support
1(UK) Artillery Brigade
16 Air Assault Brigade
Multinational Engineer Brigade (based on 8 (UK) Force Engineer Brigade)
Engineer Battalion (2) (Not identified—would be identified through force generation if/when required)
Electronic Warfare Battalion (14 Signal Regt)
Special Operations Forces
Joint Helicopter Force
Chemical, Biological, Radiological and Nuclear Defence Regiment (Joint CBRN Regiment)
Electronic Warfare Coordination Cell (from 14 Signal Regiment)
Engineer Works Team
Combat Service Support
Port Regiment (17 Port and Maritime Regiment Royal Logistic Corps)
Movement Control Company Battalion (162 Movement Control Regiment Royal Logistic Corps)
Transport and Support Group (based on HQ 2 Multinational Logistic Support Group)
Medical Group (based on 2(UK) Medical Brigade)
ARRC Multinational Military Police Battalion (based on Royal Military Police Battalion HQ)
Recovery Company (Not identified—would be identified through force generation if/when required)
ARRC Combat Affiliations
1(UK) Armoured Division (Includes 4 (UK) Mechanised Brigade, 7 (UK) Armoured Brigade, 20 (UK) Armoured Brigade)
3 (UK) Mechanised Division (Includes 1 (UK) Mechanised Brigade, 12 (UK) Mechanised Brigade, 19 (UK) Light Brigade
Rear Area Security Force
Rear Area Security Brigade HQ
Mechanised Battalions (2) (Not identified—would be identified through force generation if/when required)
Reconnaissance Company (Not identified—would be identified through force generation if/when required)
Artillery Battalion (Not identified—would be identified through force generation if/when required)
Engineer Battalion (Not identified—would be identified through force generation if/when required)