
Combined Operations Headquarters was a department of the British War Office set up during Second World War to harass the Germans on the European continent by means of raids carried out by use of combined naval and army forces.

The Defence Fire and Rescue Service (DFRS) is the primary firefighting and rescue service protecting British defence estates and property. Along with the Royal Air Force Rescue and Firefighting Service, it forms the Ministry of Defence Fire Services.

The Joint Aircraft Recovery and Transportation Squadron (JARTS), informally known as Crash and Smash is a combined Royal Navy and Royal Air Force squadron that is tasked with the recovery and surface transportation of aircraft under the aegis of the British military framework. The squadron operates worldwide, and recovering aircraft from post-crash incidents is a large part of their work. Whilst they are a component of the British military, they may be asked to attend and recover aircraft from non-military incidents as they have a Memorandum of Understanding with the UK's Air Accident Investigation Branch (AAIB).

The Joint Arms Control Implementation Group is a specialist defence component affiliated to UK Joint Forces Command; which carries out a range of arms control and verification functions. JACIG was originally based at RAF Scampton ; established in 1990, it was declared by the MOD as operational on 1 January 1991. Originally it was formed to performing treaty associated tasks as part of the UK's commitment to post Cold War confidence building associated with the Vienna Document and the Treaty on Conventional Armed Forces in Europe. Its operating base is currently RAF Henlow in Bedfordshire.

The Joint Chemical, Biological, Radiological and Nuclear Regiment was a specialist expeditionary unit of the British armed forces. Personnel of the Joint CBRN Regiment were trained in the detection, identification and monitoring of nuclear, biological and chemical weapons.

Joint Strike Wing, previously known as Joint Force Harrier (JFH), was the British military formation which controlled the STOVL BAE Harrier II aircraft of the Royal Air Force and Fleet Air Arm. It was subordinate to RAF Air Command.

The Joint Forward Air Controller Training and Standards Unit (JFACTSU) is a training unit located at RAF Leeming in North Yorkshire, England. The unit teaches students from across all three services of the United Kingdom's Armed Forces about Forward Air Control (FAC) including laser designation of targets. Forward Air Controllers working from a forward position on the ground or in the air, direct the action of combat aircraft engaged in close air support of land forces.

The Joint Ground Based Air Defence Headquarters or JtGBAD HQ was a joint (non-deployable), force-generating British military formation under the operational command of RAF Air Command, sitting under No.1 Group. It was formed circa 2000 and disbanded in 2019 in favour of 7th Air Defence Group.

Joint Helicopter Command (JHC) is a tri-service organisation uniting battlefield military helicopters of the British Armed Forces for command and coordination purposes. Joint Helicopter Command reports directly to the Chief of the General Staff.

The Joint Special Forces Aviation Wing (JSFAW) is a Royal Air Force and British Army organisation that coordinates the provision of aviation support to the United Kingdom Special Forces.

The Lightning Force HQ is the overall command organisation controlling the operations of the Lockheed Martin F-35B Lightning aircraft of the Fleet Air Arm and Royal Air Force. Following on from the principles developed in the operation of the UK's previous STOVL aircraft, the Harrier, the formation is a joint organisation falling under RAF Air Command.

The Permanent Joint Headquarters (PJHQ) is the British tri-service headquarters from where all overseas military operations are planned and controlled. It is situated at Northwood Headquarters in Northwood, London. The Permanent Joint Headquarters is commanded by the Chief of Joint Operations (CJO) and the current CJO is Vice Admiral Ben Key.

The Royal Air Force Special Duties (SD) Service was a secret air service created to provide air transport to support the resistance movement in Axis controlled territories. The service helped develop and support the resistance by bringing in agents, wireless operators and supplies. Parachute drop was the primary method by which the Special Duties units delivered supplies and most of the agents to the occupied countries. They also developed an air taxi service to pick up agents, political leaders and special communications from occupied Europe and bring them to England. On the outward flight the air taxi service also delivered agents and high value packages to France. Special Duties flights flew to target fields in Vichy France, Occupied France, Belgium, Netherlands, Norway, Poland, Czechoslovakia, Yugoslavia, and Greece. By the end of the war Special Duties units were also operating in the Far East. The air units were controlled by the Royal Air Force, and worked closely with the SOE and the SIS.