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British Defence Review

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British Defence Review
NameBritish Defence Review
TypePolicy review
JurisdictionUnited Kingdom
Initiated20th century
ResponsiblePrime Minister of the United Kingdom
MinisterSecretary of State for Defence

British Defence Review

The British Defence Review is a periodic strategic assessment and policy document that sets the United Kingdom's defence policy priorities, force posture, procurement plans and international commitments. It aims to align the Ministry of Defence planning with the directives of the Prime Minister of the United Kingdom, the Cabinet Office, and parliamentary oversight through the House of Commons Defence Committee and House of Lords Armed Forces and Security Committee. Reviews typically influence relations with NATO, the United States, the European Union, the United Nations, and partners such as France, Germany, Australia, and Japan.

Background and purpose

The British Defence Review provides a formal mechanism for the Prime Minister of the United Kingdom and the Secretary of State for Defence to reconcile strategic assessments from the Joint Intelligence Committee (United Kingdom), operational advice from the Chief of the Defence Staff, and fiscal guidance from the Chancellor of the Exchequer and the Treasury (United Kingdom). It articulates priorities that affect the British Army, Royal Navy, and Royal Air Force, sets requirements for the Defence Equipment and Support organisation, and frames commitments to multinational operations such as those led by NATO, the United Nations Security Council, or coalitions like those in Iraq and Afghanistan. The review is used to explain adjustments to basing in places like Akrotiri and Dhekelia, Falkland Islands, and commitments to forward presence in the Baltic states and the Gulf.

Historical context and previous reviews

Past iterations trace to wartime planning such as the Committee of Imperial Defence era and postwar white papers including the 1950s defence reviews influenced by the Korean War and the Suez Crisis. Major modern reviews include the 1998 Strategic Defence Review that followed debates after the Bosnian War and the 2010 Strategic Defence and Security Review conducted under the Cameron ministry, influenced by the Global Financial Crisis and operations in Afghanistan and Iraq War. The 2015 Strategic Defence and Security Review and later National Security Capability Reviews responded to challenges from Russia after the Crimea crisis and the rise of ISIL, shaping procurement choices linked to programmes such as Queen Elizabeth-class aircraft carrier, Eurofighter Typhoon, and Type 26 frigate orders. These reviews often reference historical landmarks like the Falklands War and strategic documents such as the Strategic Defence Review 1998.

Strategic priorities and defence policy

Reviews set strategic priorities that balance territorial defence, expeditionary capability, nuclear deterrent maintenance tied to Trident (UK programme), and resilience against hybrid threats exemplified by incidents like the 2018 Salisbury poisonings. They define posture toward peer competitors including Russia, regional actors such as Iran, and broader theatres involving the Indo-Pacific where ties with Australia and India are emphasised. Policy decisions shape the United Kingdom’s commitments to NATO’s Enhanced Forward Presence, contributions to the Combined Joint Expeditionary Force with France, and participation in multinational exercises like Exercise Joint Warrior and RIMPAC.

Force structure and capability changes

The review prescribes force structure changes across the British Army, adjusting brigade counts, mechanised formations relevant to equipment like the Challenger 2, and reserves such as the Army Reserve (United Kingdom). Naval directives influence the Royal Navy fleet composition including surface combatants, submarines of the Astute-class, and carriers of the Queen Elizabeth-class aircraft carrier programme; air directives affect the Royal Air Force inventory including Eurofighter Typhoon, F-35 Lightning II, and unmanned systems. Changes often involve basing decisions at ports like Portsmouth and air bases such as RAF Lossiemouth and integration of multi-domain concepts linking cyber units within organisations like Government Communications Headquarters and the Defence Intelligence. Reviews also address special forces coordination including Special Air Service and Special Boat Service tasking.

Procurement, equipment and industrial strategy

Procurement policy directs partnerships with defence industries including BAE Systems, Rolls-Royce plc, BAE Systems Submarines, and Airbus Defence and Space for platforms from ships to engines to aircraft. Industrial strategy components seek sovereign capabilities through shipbuilding at yards like Portsmouth Naval Base and Rosyth Dockyard, sustainment of supply chains involving firms such as Raytheon Technologies and Thales Group, and export controls coordinated with the Department for International Trade and the Export Control Organisation. Reviews frequently address collaborative programmes such as the Tempest (Future Combat Air System) and multinational procurement frameworks like the European Defence Agency projects.

Budget, funding and economic implications

Financial implications link the review to allocations from the Treasury (United Kingdom), fiscal planning under the Spending Review, and oversight by the Public Accounts Committee. Budget decisions determine equipment timelines for capital programmes, personnel funding for units including the Royal Marines, and sustainment costs for nuclear deterrent operations at Faslane. Economic impacts extend to regional defence supply chains in areas like Scotland, South West England, and the North East of England, and influence industrial policy, export revenues, and employment associated with companies such as Babcock International and MBDA (missile manufacturer).

International relations and alliances impact

The review affects bilateral and multilateral relationships including the North Atlantic Treaty Organization, the United Nations, and partnerships such as the AUKUS framework involving United States and Australia. It shapes defence cooperation with France through the Lancaster House Treaties, interaction with the European Union on security initiatives, and interoperability commitments with allies in air, maritime, cyber, and space domains where collaboration with organisations like NATO Allied Command Transformation and exercises like Trident Juncture matter. The review’s posture influences UK participation in sanctions regimes tied to the United Nations Security Council resolutions and affects diplomatic relations with states such as China and Turkey.

Category:United Kingdom defence policy