The United Kingdom constitution – a mapping exercise
A briefing paper which "maps" (or summarises) the main elements of the United Kingdom's uncodified constitution.
International Law and the Chagos Archipelago
This briefing revisits the main international legal issues leading to the 2025 UK-Mauritius agreement on sovereignty over the Chagos Archipelago.
Armed Forces Bill 2026-27
During Commons stages, 82 government amendments were made to the Armed Forces Bill 2026-27. The bill is now before the House of Lords.
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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–EU Agreement on Gibraltar: Draft text and next steps
The UK and EU have agreed the text of a treaty on Gibraltar's relationship with the EU, linking Gibraltar to the EU Schengen area and EU customs union
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Research Briefing
The separation of powers in the UK’s Overseas Territories
The paper describes the separation of powers between the executive, legislative and judicial branches of the governments of the UK's Overseas Territories.
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Research Briefing
UK–Bermuda relations and the visit of King Charles III 2026
Between 1 May and 2 May 2026, the King is due to visit Bermuda. This page provides a summary of royal visits to Bermuda and sets out recent issues in UK–Bermuda relations.
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Research Briefing
Proscribed Terrorist Organisations
The Home Secretary can proscribe organisations believed to be involved in terrorism under the Terrorism Act 2000
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Research Briefing
Beneficial ownership registers in the Overseas Territories and Crown Dependencies
The UK Government expects all Overseas Territories and Crown Dependencies to introduce public registers of beneficial ownership. What progress has been made?
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Research Briefing
The UK Overseas Territories and their Governors
The paper describes the role of UK-appointed Governors in the Overseas Territories to make law and policy on reserved topics, such as external affairs.
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Research Briefing
Strategic Defence Review 2025: Key points and paper series
A high-level overview of the Strategic Defence Review and relevant Commons Library briefing papers.
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Research Briefing
Diego Garcia Military Base and British Indian Ocean Territory Bill 2024-25
A briefing on the Diego Garcia Military Base and British Indian Ocean Territory Bill 2024-25.
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Research Briefing
2025 treaty on the British Indian Ocean Territory/Chagos Archipelago
Under the agreement, the UK will cede sovereignty of the Chagos Archipelago to Mauritius but will pay for the right to operate the Diego Garcia military base
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Research Briefing
The Crown and the constitution
A briefing paper on the constitutional aspects of the Crown
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Research Briefing
The royal prerogative and ministerial advice
A briefing paper on the royal prerogative and ministerial advice to the Crown on both the prerogative and statutory public appointments
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