Deploying the armed forces in the UK
This briefing looks at when the armed forces can be deployed in the UK, what they do, and the legal basis.
What is a ‘whole of society’ approach to defence and security?
What is the government doing to prepare the UK for crisis or conflict?
Home defence: What is the War Book?
The government is working on new plans for the country in the event of a military attack. During the 20th century, plans were set out in the War Book.
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Research Briefing
What is NATO’s Article 3 commitment to national resilience?
What are NATO's treaty obligations on national resilience and civil preparedness?
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Research Briefing
Military assistance to Ukraine: What has changed since January 2025?
How has military assistance to Ukraine changed since January 2025 when US President Donald Trump took office?
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Research Briefing
Proposals for a Coalition of the Willing in Ukraine
Part of proposals for securing any future peace deal in Ukraine is the deployment of a European-led multinational force, or Coalition of the Willing.
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Research Briefing
Timeline of British military assistance to Ukraine (2022 to present)
What military assistance is the UK providing to Ukraine?
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Research Briefing
UK forces in the Middle East region
The UK armed forces use a range of bases and facilities in the Middle East.
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Research Briefing
UK defence personnel statistics
How many people serve in the UK armed forces, how diverse are they, and how many people are joining and leaving?
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Research Briefing
Japan’s strengthening military posture and new security policies
Since 2022, Japan has significantly increased its defence spending, updated its security policies and removed barriers to exporting arms.
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Research Briefing
UK defence spending
A summary of UK defence spending, including recent trends, spending plans, and international comparisons of the defence spending of NATO allies.
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Research Briefing
The United Kingdom constitution – a mapping exercise
A briefing paper which "maps" (or summarises) the main elements of the United Kingdom's uncodified constitution.
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Research Briefing
The Privy Council: history, functions and membership
A briefing paper on the history, functions and membership of the Privy Council
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Research Briefing
UK rearmament and warfighting readiness
A debate on UK rearmament and warfighting readiness will take place on Wednesday 8 July 2026, in the House of Commons chamber.
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Research Briefing
Defence Investment Plan: Key decisions
On 30 June 2026, the government published its long-awaited Defence Investment Plan. What are the key decisions for MOD spending over the next four years?
Total results (page 1 of 30)