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UK and Ireland to test readiness for undersea cable incidents

Published by Global Banking & Finance Review

Posted on March 13, 2026

2 min read

· Last updated: April 1, 2026

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UK and Ireland to test readiness for undersea cable incidents
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LONDON, March 13 (Reuters) - Britain and Ireland will conduct live exercises to test their readiness for incidents involving subsea cables, the two countries' leaders said in a joint statement setting

UK and Ireland Plan Joint Exercises to Test Undersea Cable Incident Response

Enhanced Maritime Cooperation and Subsea Security Initiatives

Joint Statement and Planned Exercises

LONDON, March 13 (Reuters) - Britain and Ireland will conduct live exercises to test their readiness for incidents involving subsea cables, the two countries' leaders said in a joint statement setting out enhanced maritime cooperation on Friday.

Motivation for the Exercises

- Citing "a more contested environment" and increased hostile state activity, Prime Minister Keir Starmer and his Irish counterpart Micheal Martin said the exercises would begin in September 2026.

Growing Concerns Over Subsea Security

Recent Incidents in Europe

- Subsea security has become an increasing concern among European nations following a string of power cable, telecom link and gas pipeline outages in the Baltic Sea region since Russia invaded Ukraine in 2022.

Details of the New Agreement

Information Sharing and Response Mechanisms

- The new agreement would "enable information sharing and coordinated response mechanisms for addressing major subsea communication cable incidents that may affect our countries," the statement said.

Ireland's Application to North Sea Security Pact

- Ireland has applied to join a 2024 agreement on subsea security covering the North Sea region, joining Belgium, the Netherlands, Germany, Norway, Britain and Denmark.

Ireland's National Security Enhancements

Planned Upgrades and Cooperation

- Ireland said last month it planned to boost radar and subsea surveillance capabilities and increase cooperation with NATO members amid growing hybrid threats in the North Atlantic

Challenges Facing Ireland

- Ireland, which is neutral and has the European Union's lowest level of defence spending, has been criticised for its lack of capability to monitor and defend territorial waters.

(Reporting by William James and Padraic Halpin)

Key Takeaways

  • The UK and Ireland will conduct joint live exercises in September 2026 to test responses to undersea cable incidents, reflecting heightened security cooperation.
  • The move responds to a surge in subsea infrastructure disruptions—power, telecom, and gas systems—particularly in the Baltic region, raising alarms over hybrid threats and sabotage.
  • Ireland is ramping up maritime surveillance: joining subsea security pacts, boosting sonar/radar capacity, and forging tailored NATO and EU intelligence-sharing mechanisms.

References

Frequently Asked Questions

Why are the UK and Ireland conducting undersea cable readiness exercises?
The exercises aim to test readiness for incidents involving subsea cables due to increased hostile state activity and recent outages in the region.
When will the UK and Ireland begin their subsea cable incident exercises?
The joint exercises to test undersea cable readiness are scheduled to begin in September 2026.
What does the new UK-Ireland agreement on subsea cables involve?
The agreement enables information sharing and coordinated response mechanisms for major subsea communication cable incidents.
Why is subsea security becoming a greater concern in Europe?
Concerns have increased following a string of outages in power cables, telecom links, and gas pipelines in the Baltic Sea since 2022.
How is Ireland enhancing its maritime security?
Ireland plans to boost radar and subsea surveillance and increase cooperation with NATO members to address hybrid threats.

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