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Tenfold Increase in Security Breaches at UK's Nuclear Submarine Base

Tenfold Increase in Security Breaches at UK's Nuclear Submarine Base

First seen 26 Feb 2026, 14:14 UTC • •

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ThreatCluster AI
ThreatCluster •March 12, 2026 at 16:10 UTC

Britain's nuclear submarine base, HMNB Clyde, has experienced a tenfold increase in security incidents, rising from 16 in 2021 to 149 in 2025. This surge is attributed to heightened threats from Russian hybrid warfare following the invasion of Ukraine. The Ministry of Defence has not disclosed specific details regarding the nature of these incidents.

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Timeline

2021-01-01
16 security incidents recorded at HMNB Clyde
2022-01-01
Data on incidents not disclosed
2025-01-01
149 security incidents recorded at HMNB Clyde
2026-02-26
LBC reports on increase in security breaches

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