SUBJECT-4190.dossier · instrument · status: active
UA
subject of file

UK-US Mutual Defence Agreement

Nuclear cooperation treaty extended indefinitely in 2024
Tracked because Nuclear cooperation treaty extended indefinitely in 2024 · 14 documented connections
Facts on record1
Connections mapped14
Sources cited6
✦ Thin coverage gap +57 connected to 14 entities · only 1 facts on record · flagged for follow-up research
Evidence: 1S
Network web → Timeline → Compare with… → Position Drift → Coverage tone → View on Graph → Export CSV JSON Dossier ← Entity Directory
Stated vs Revealed
No documented contradictions on file.
PATTERN company → [contractor] → institution → [treaty partner] →... 14× PATTERN instrument → [treaty partner] → institution → [contractor... 14× PATTERN person → [oversight] → institution → [treaty partner] → i... 12× PATTERN instrument → [treaty partner] → institution → [oversight]... 12× PATTERN instrument → [treaty partner] → institution → [employment... 10×
Connection Map
Key Connections
→ UKUSA Agreement instrument
predecessor agreement
The UK-US Mutual Defence Agreement is part of the broader UKUSA intelligence-sharing framework, which evolved from the BRUSA Agreement.
→ BRUSA Agreement instrument
predecessor agreement
The UK-US Mutual Defence Agreement (MDA) is a successor to the broader BRUSA (UKUSA) Agreement, which established the foundational signals intelligence sharing between the UK and US.
→ UK Ministry of Defence institution
treaty partner
The UK-US Mutual Defence Agreement is a bilateral treaty between the United Kingdom and the United States, administered by the UK Ministry of Defence.
→ US Department of Defense (Pentagon) institution
treaty partner
The UK-US Mutual Defence Agreement is a bilateral treaty between the United Kingdom and the United States, administered by the US Department of Defense.
Facts (1)
Data Freshness
Stale Last update: 186d ago · Avg age: 274d
Confidence Tiers: Primary Source — cross-referenced government/corporate filings Pending Review — sourced but not independently verified AI Inference — analytical hypothesis from cross-referencing
Raw Filing Records (1) — unsourced metadata
Pending Review Search scope note: No sec filings found for "UK-US Mutual Defence Agreement" in automated database search as of 2026-04-13. This reflects search coverage limits, not confirmed absence from public record.
Added: 13 Apr 2026 UNVERIFIED Research: UK-US Mutual Defence Agreement — SEC filings (no results)
All Connections (14)
→ UK Ministry of Defence institution
treaty partner primary since 1958
The UK-US Mutual Defence Agreement is a bilateral treaty between the United Kingdom and the United States, administered by the UK Ministry of Defence.
treaty partner primary since 1958
The UK-US Mutual Defence Agreement is a bilateral treaty between the United Kingdom and the United States, administered by the US Department of Defense.
related agreement inferential since unknown
Both the UK-US Mutual Defence Agreement and the Customs Mutual Assistance Agreement are bilateral UK-US agreements; the CMAA appears in the same known entities list context.
→ BRUSA Agreement instrument
predecessor agreement primary since 1948
The UK-US Mutual Defence Agreement (MDA) is a successor to the broader BRUSA (UKUSA) Agreement, which established the foundational signals intelligence sharing between the UK and US.
→ UKUSA Agreement instrument
predecessor agreement primary since 1946
The UK-US Mutual Defence Agreement is part of the broader UKUSA intelligence-sharing framework, which evolved from the BRUSA Agreement.
→ US-UK Joint Contact Group institution
associated body inferential since 2010
The US-UK Joint Contact Group operates alongside the UK-US Mutual Defence Agreement framework to coordinate bilateral defense cooperation.
related bilateral agreement secondary since 2004
The PCSC agreements are documented alongside the UK-US Mutual Defence Agreement as part of the bilateral security framework between the UK and US.
intelligence community oversight body inferential since 2015
The UK-US Mutual Defence Agreement underpins intelligence-sharing arrangements that are subject to oversight by the Five Eyes Intelligence Oversight and Review Council.
UK oversight body inferential since 2013
The UK's Intelligence and Security Committee of Parliament provides oversight of activities conducted under the UK-US Mutual Defence Agreement.
→ Cabinet Office (UK) government agency
UK coordinating body inferential since 2010
The UK Cabinet Office coordinates cross-government implementation of the UK-US Mutual Defence Agreement through the National Security Secretariat.
→ Investment Security Unit government agency
UK government unit inferential since 2018
The Investment Security Unit within the UK's National Security Secretariat reviews transactions involving entities covered under the UK-US Mutual Defence Agreement.
→ National Security Secretariat government agency
UK coordinating body inferential since 2010
The National Security Secretariat in the UK Cabinet Office oversees implementation of the UK-US Mutual Defence Agreement.
related defense modernization initiative inferential since 2020
The NCDMO works under the broader UK-US Mutual Defence Agreement framework for modernizing continental defense systems.
← Shabana Mahmood person
treaty_oversight secondary since 2024
As Home Secretary, Shabana Mahmood has oversight responsibilities related to the UK-US Mutual Defence Agreement through the Home Office's national security functions.
Sources (6)
2026 UNVERIFIED Research: UK-US Mutual Defence Agreement — Parliamentary records (no results) parliamentary_record Processed 📜 Receipt
2026 UNVERIFIED Research: UK-US Mutual Defence Agreement — Court records (no results) court_document Processed 📜 Receipt
2026 UNVERIFIED Research: UK-US Mutual Defence Agreement — Lobbying disclosures (no results) government_disclosure Processed 📜 Receipt
2026 UNVERIFIED Research: UK-US Mutual Defence Agreement — Corporate registrations (no results) government_disclosure Processed 📜 Receipt
2026 UNVERIFIED Research: UK-US Mutual Defence Agreement — USASpending contracts (no results) contract Processed 📜 Receipt
2026 UNVERIFIED Research: UK-US Mutual Defence Agreement — SEC filings (no results) sec_filing Processed 📜 Receipt