TL;DR: In November 2025, the United Kingdom suspended intelligence sharing with the United States regarding suspected drug trafficking in the Caribbean. The reason: Britain doesn't want its intelligence used for US military strikes that UK officials believe are illegal under international law. Colombia has also ordered its security forces to stop sharing intelligence with Washington. Canada has signaled similar concerns. The strikes, which began in September 2025 and have killed at least 75 people, represent a break in the Five Eyes alliance, the closest intelligence partnership in the world.
What Happened
In early September 2025, US military forces began striking vessels in the Caribbean accused of carrying drugs. The Pentagon framed the operations as part of the war on drug trafficking, particularly targeting boats allegedly linked to Venezuela.
The strikes quickly became controversial:
- At least 75 people have been killed, according to Pentagon figures
- The operations target boats in international waters
- Critics argue they violate international law governing the use of military force
- The UN High Commissioner for Human Rights has condemned the strikes
Britain had been providing intelligence on suspected drug vessels, a natural role given its Caribbean territories. But when the US started using that intelligence for lethal military strikes, the UK pulled back.
Why Britain Stopped
According to reporting by CNN and other outlets, British officials made a determination:
- The US strikes are likely illegal under international law
- Continuing to provide intelligence would make the UK complicit
- The intelligence pause began in late October 2025
This is not a complete break in the Five Eyes alliance. The UK continues to share intelligence with the US across virtually all other domains. But for Caribbean drug trafficking specifically, Britain has drawn a line.
Why the UK Matters Here
Britain has significant presence in the Caribbean:
- Multiple British Overseas Territories in the region
- Historic involvement in Caribbean security
- Intelligence assets and relationships throughout the area
UK intelligence on Caribbean drug trafficking was valuable precisely because of this regional presence. Losing it represents a significant gap for US operations.
Other Countries Pull Back
Britain isn't alone. Multiple US partners have signaled concerns:
Colombia
Colombian President Gustavo Petro ordered his country's security forces to stop sharing intelligence with the United States until the strikes stop. Colombia, a major US partner in counter-narcotics operations, is a significant break.
Canada
Canadian officials have "made clear to the US that it does not want its intelligence being used to help target boats for deadly strikes." While Canada hasn't formally suspended sharing, it has communicated boundaries.
International Organizations
UN High Commissioner for Human Rights Volker Türk condemned the strikes: "These attacks, and their mounting human cost, are unacceptable."
The Legal Questions
The core dispute is whether the US military strikes are legal:
US Position
- Drug trafficking threatens national security
- Venezuela under Maduro is an "illegitimate" regime linked to trafficking
- Military action against drug boats is justified
Critics' Position
- Drug trafficking is a criminal matter, not a military one
- Using lethal force in international waters against non-military vessels is disproportionate
- The strikes lack authorization under international law
- Killing people accused of crimes without trial violates due process
By suspending intelligence sharing, Britain is effectively taking a position: it believes the strikes cross legal lines it's unwilling to help cross.
Implications for Five Eyes
The Five Eyes alliance, US, UK, Canada, Australia, New Zealand, is the closest intelligence partnership in the world. Members share virtually all signals intelligence by default and have done so since 1946.
This break is limited but significant:
What This Doesn't Mean
- The Five Eyes alliance is not collapsing
- Broader intelligence sharing continues
- Counter-terrorism cooperation remains intact
What This Does Mean
- Even the closest allies have limits
- Intelligence sharing can be conditioned on how that intelligence is used
- Partners can and will draw lines when they believe operations are illegal
- The "special relationship" between the US and UK isn't unconditional
One analyst noted: "Britain is America's most important intelligence partner in a spying alliance of five English-speaking democracies." When that partner refuses to participate in a US operation, it signals serious concern.
Historical Precedents
Intelligence sharing suspensions between allies are rare but not unprecedented:
- 2013: Germany temporarily limited cooperation after Snowden revealed NSA surveillance of Angela Merkel
- 2017: Briefly suspended sharing with the US after Trump disclosed Israeli intelligence to Russian officials
- Various: Countries have historically pulled back cooperation during policy disputes
What makes this case notable is that it's specifically about complicity in military operations the partner country considers illegal, not about mistrust of the intelligence itself or concerns about leaks.
What This Means Going Forward
The UK suspension raises questions that extend beyond this specific dispute:
For Intelligence Sharing
- Can intelligence providers condition how their information is used?
- What happens when allies disagree on the legality of operations?
- How do Five Eyes partners navigate when one member's policies are unacceptable to others?
For the Five Eyes Alliance
- The alliance has always assumed shared values and legal frameworks
- When members disagree on what's legal, the assumption breaks down
- This may be the first explicit case of an ally refusing to participate on legal grounds
For US Operations
- The US loses valuable Caribbean intelligence
- Operations may become more difficult without partner cooperation
- Other allies may draw similar lines on other issues
The Bottom Line
For 80 years, the Five Eyes alliance has operated on the assumption that its members share not just intelligence, but values and legal interpretations. The UK's decision to suspend Caribbean intelligence sharing demonstrates that even the closest partners have limits.
Britain made a calculation: providing intelligence that enables operations it considers illegal would make it complicit. The alternative, continuing to share while voicing private concerns, was apparently not acceptable.
This isn't a break in the Five Eyes alliance. It's a boundary. And boundaries, once established, can be drawn again.
The lesson for the broader intelligence-sharing framework is clear: partnerships depend not just on trust, but on shared views of what's permissible. When those views diverge, even the oldest allies may part ways, at least on specific issues.
References
- CNN, UK Suspends Caribbean Intelligence Sharing with US
- The Hill, US-UK Intelligence Break Over Caribbean Strikes
- TIME, Countries Stop Sharing Intelligence With US
- NBC News, UK Withholds Intelligence on Drug Boats
- WBUR, What the US Loses When Allies Stop Sharing Intelligence
- Washington Post, UK Limiting Intelligence Sharing