
The Ministry of Defence is the British government department responsible for implementing the defence policy set by Her Majesty's Government, and is the headquarters of the British Armed Forces. It is the UK's ministry of defence.

The Admiralty Board is the body established under the Defence Council of the United Kingdom for the administration of the Naval Service of the United Kingdom. It meets formally only once a year, and the day-to-day running of the Royal Navy is conducted by the Navy Board, which does not include any ministers.

The Air Force Board of the Defence Council is responsible for the management of the Royal Air Force.

The Army Council was the supreme administering body of the British Army from its creation in 1904 until it was reconstituted as the Army Board in 1964.

The Army Foundation College recruit abuse investigation 2014–18 was a response to allegations from a group of 17-year-old British army recruits that 17 instructors had maltreated them during their training over nine days in June 2014. It was reported as the British army's largest ever investigation of abuse. Among the allegations were that the instructors assaulted recruits, smeared cattle dung into their mouths, and held their heads under water. The accused were initially charged with 40 counts of battery, actual bodily harm, and other offences; all denied the charges made against them.

Bailey v Ministry of Defence [2008] EWCA Civ 883 is an English tort law case. It concerns the problematic question of factual causation, and the interplay of the "but for" test and its relaxation through a "material contribution" test.

The British Army is the principal land warfare force of the United Kingdom, a part of the British Armed Forces. As of 2020, the British Army comprises just over 78,880 regular (full-time) personnel and just over 30,020 reserve (part-time) personnel.

The Chief of the Defence Staff (CDS) is the professional head of the British Armed Forces and the most senior uniformed military adviser to the Secretary of State for Defence and the Prime Minister of the United Kingdom. The Chief of the Defence Staff is based at the Ministry of Defence and works alongside the Permanent Under Secretary, the ministry's senior civil servant. The Chief of the Defence Staff is the British equivalent position of what in NATO and the European Union is known as the Chief of Defence.

The CLH Pipeline System , formerly the Government Pipelines and Storage System (GPSS), is a United Kingdom pipeline system run by CLH. The network at one time consisted of over 2,500 kilometres (1,600 mi) of pipeline and 46 other facilities. However, several of these facilities were closed before the GPSS was sold in 2015 and a number of the pipelines were mothballed and later abandoned. Earlier the total number of facilities on the GPSS was much larger than 46. For example, in 1989 there were 40 Petroleum Storage Depots in operation plus large numbers of other facilities such as pump-stations, junctions, and ingress and egress points. It is interconnected with some other commercial pipeline systems.

DBS Civilian HR is a unit within the Defence Business Services (DBS) organisation of the United Kingdom's Ministry of Defence (MoD). It is responsible for providing civilian personnel services to the MoD. The agency was known as the People, Pay and Pensions Agency from April 2006 when it subsumed the Pay & Personnel Agency, until July 2011 when its status as an executive agency was removed and it was integrated into the newly established DBS organisation.

The Defence Academy of the United Kingdom provides higher education for personnel in the British Armed Forces, Civil Service, other government departments and service personnel from other nations. The Director General of the Defence Academy is Air Marshal Edward Stringer, a senior Royal Air Force officer.

The Defence Council of the United Kingdom is the body legally entrusted with the defence of the United Kingdom and its overseas territories and with control over the British armed forces, and is part of the Ministry of Defence.

Defence Intelligence (DI) is an organisation within the United Kingdom intelligence community which focuses on gathering and analysing military intelligence. It differs from the UK's intelligence agencies in that it is an integral part of the Ministry of Defence (MoD) rather than a stand-alone organisation. The organisation employs a mixture of civilian and military staff and is funded within the UK's defence budget. The organisation was formerly known as the Defence Intelligence Staff (DIS), but changed its name in 2009.

The Duke of York’s Royal Military School, more commonly called the Duke of York’s, is a co-educational academy with military traditions in Dover, Kent. Since becoming an academy in 2010, the school is now sponsored by the Ministry of Defence, and accepts applications from any student wishing to board. Before 2010, only those students whose parents were serving or had served in the armed forces were eligible.

The Dumfries and Galloway Aviation Museum is a volunteer-operated aviation museum located in and around the World War II-era watch tower at the former RAF Dumfries, located two miles north east of the centre of Dumfries, Scotland, which was in service from June 1940 until 1957, when it closed. The site was sold to a private company in 1960. The museum, founded in 1977 by the Dumfries and Galloway Aviation Group, has a collection of aircraft, both civil and military, aero engines, artifacts, and a small, but "ever expanding collection of memorabilia honouring airborne forces."

Her Majesty's Naval Service, also known as the Senior Service, is the United Kingdom's naval warfare and maritime service. It consists of the Royal Navy, Royal Marines, Royal Fleet Auxiliary, Royal Naval Reserve, Royal Marines Reserve and Naval Careers Service. The term Naval Service should be distinguished from the "UK Naval Services", which consist of the Naval Service and the Merchant Navy. The Naval Service as a whole falls under the command of the Navy Board, which is headed by the First Sea Lord. This position is currently held by Admiral Tony Radakin. The Defence Council delegates administration of the Naval Service to the Admiralty Board, chaired by the Secretary of State for Defence.

The postal service of the British Army is today provided by the British Forces Post Office but its origins may be traced back to Saxon times.

The United Kingdom Hydrographic Office (UKHO) is the UK's agency for providing hydrographic and marine geospatial data to mariners and maritime organisations across the world. The UKHO is a trading fund of the Ministry of Defence (MoD) and is located in Taunton, Somerset, with a workforce of approximately 900 staff.

The Minister for International Security Strategy was a British government position. The last holder of the post was Andrew Murrison, Conservative Parliamentary Under-Secretary of State at the Ministry of Defence,

The Parliamentary Under-Secretary of State for the Armed Forces, formerly of Minister of State rank, is a junior ministerial position, subordinate to the Secretary of State for Defence, at the Ministry of Defence in Her Majesty's Government.

The Minister for Veterans is a junior position in the Ministry of Defence in the British government. It is currently held by Johnny Mercer, who took the office on 28 July 2019.

The Minister of State for Defence is a junior position in the Ministry of Defence in the British government. It is currently held by Baroness Goldie, who took the office on 26 July 2019.

The Ministry of Defence Guard Service (MGS) is part of the Defence Infrastructure Organisation of the Ministry of Defence, and provides military establishments across the United Kingdom with unarmed security guards and patrol services.

The Ministry of Defence Main Building or MOD Main Building, also known as MOD Whitehall or originally as the Whitehall Gardens Building, is a grade I listed government office building located on Whitehall in London. The building was designed by E. Vincent Harris in 1915 and constructed between 1939 and 1959 on the site of the Palace of Whitehall. It was initially occupied by the Air Ministry and the Board of Trade before in 1964 becoming the current home of the Ministry of Defence.

The Ministry of Defence Police (MDP) is a civilian special police force which is part of the United Kingdom's Ministry of Defence. The MDP's primary responsibilities are to provide armed security and counter terrorism services to designated high-risk areas, as well as uniformed policing and limited investigative services to Ministry of Defence property, personnel, and installations throughout the United Kingdom. The MDP are not military police and should not be confused with the Royal Military Police or any other British Service Police.

The National Army Museum is the British Army's central museum. It is located in the Chelsea district of central London, adjacent to the Royal Hospital Chelsea, the home of the "Chelsea Pensioners". The museum is a non-departmental public body. It is usually open to the public from 10:00am to 5:30pm, except on 25–26 December and 1 January. Admission is free.

The National Museum of the Royal Navy was created in early 2009 to act as a single non-departmental public body for the museums of the Royal Navy. With venues across the United Kingdom, the museums detail the history of the Royal Navy operating on and under the sea, on land and in the air.

The Novel Air Concept is a "Capability Vision", an initiative of the British Ministry of Defence to stimulate innovative solutions to long-term defence challenges that may lead to a future capability. This concept, announced in 2009, is for an autonomous UAV which would be able to hover like a helicopter or fold its rotor blades and fly as an aeroplane. The NAC would be able to operate within "urban canyons" and be a test platform for new weapons such as microwave or laser guns.

Project Condign was a secret UFO study undertaken by the British Government's Defence Intelligence Staff (DIS) between 1997 and 2000.

Queen Victoria School (QVS) is a non-selective, co-educational, boarding school predominantly for children of Scottish Servicemen/women aged 10/11 to 18. It occupies a Scottish Baronial-style building on a rural campus just outside Dunblane, a short distance away from the city of Stirling, Scotland. It is the only school in the United Kingdom managed and funded by the Ministry of Defence.

The Royal Air Force (RAF) is the United Kingdom's aerial warfare force. It was formed towards the end of the First World War on 1 April 1918 and is the world's oldest independent national air force. Following the Allied victory over the Central Powers in 1918, the RAF emerged as the largest air force in the world at the time. Since its formation, the RAF has taken a significant role in British military history. In particular, it played a large part in the Second World War where it fought its most famous campaign, the Battle of Britain.

The Royal Air Force Museum Cosford, located in Cosford in Shropshire, is a museum dedicated to the history of aviation and the Royal Air Force in particular. The museum is part of the Royal Air Force Museum, a non-departmental public body sponsored by the Ministry of Defence and a registered charity. The museum is spread over two sites in England; the other site is at the Royal Air Force Museum London at Colindale in north London.

The Royal Air Force Museum London is located on the former Hendon Aerodrome. It includes five buildings and hangars showing the history of aviation and the Royal Air Force. It is part of the Royal Air Force Museum.

The Corps of Royal Marines (RM) is an amphibious light infantry and also one of the five fighting arms of the Royal Navy. The marines can trace their origins back to the formation of the English Army's "Duke of York and Albany's maritime regiment of Foot" at the grounds of the Honourable Artillery Company on 28 October 1664.
The Royal Marines Museum is a museum on the history of the Royal Marines from their beginnings in 1664 through to the present day. A registered charity, it is also a designated service museum under the terms of the National Heritage Act 1983 and receives Grant-in-Aid from the Ministry of Defence. During 2011 it formally became part of the National Museum of the Royal Navy, an executive non-departmental public body of the Ministry of Defence. The museum's galleries are currently closed, pending relocation.

The Royal Military College of Science (RMCS) was a British postgraduate school, research institution and training provider with origins dating back to 1772. It became part of the Defence Academy of the United Kingdom in 2009, and ceased to exist as an independent unit in 2015.

The Secretary of State for Defence, also referred to as the Defence Secretary, is a senior Minister of the Crown within the Government of the United Kingdom, and head of the Ministry of Defence (MoD). The office forms part of the British Cabinet.

Sovereign Base Areas Customs is a semi-autonomous branch of HM Revenue and Customs of the United Kingdom. It has jurisdiction over Akrotiri and Dhekelia, a British Overseas Territory on the island of Cyprus, administered as a Sovereign Base Area, and home to British Forces Cyprus. It is managed by the Ministry of Defence (MoD) and around 3500 military personnel are posted there at any one time.