MoD Confirms Category A Nuclear Incident at Faslane Base
A Category A nuclear incident at Faslane involved a high risk of radioactive release, with 105 additional lower-category incidents reported from April 2024 to April 2025.
- Between January 1 and April 22, 2025, a Category A nuclear event—the most severe classification—was reported at the Faslane naval facility on Scotland’s west coast.
- This incident followed a prior 2023 Category A event, marking the second highest-category case at Faslane in two years with potential for radioactive release.
- The Ministry of Defence confirmed that there was no radiological impact or danger to the public from this or any other nuclear site incidents, highlighting their strong focus on safety and continuous improvement.
- From April 2024 to April 2025, numerous lower-level incidents were recorded at Faslane and the nearby Coulport facility, while a past radioactive water leak at Coulport was linked to deteriorated pipes bursting.
- The SNP demands urgent details on the incident and contamination, warning nuclear weapons pose ongoing environmental and safety threats despite government backing of nuclear deterrence.
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A serious 'nuclear incident' in the highest risk category has occurred at a naval base in Scotland.
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Read Full ArticleRoyal Navy submarine base records significant nuclear safety incident - Navy Lookout
The MoD has admitted that a ‘Category A’ nuclear safety incident occurred earlier this year at Faslane, home to the RN’s all-nuclear powered submarine flotilla. Category A incidents are defined as having an actual or high potential for the release of radioactive material into the environment. The incident took place between January and April 2025
Coverage Details
Total News Sources21
Leaning Left5Leaning Right7Center6Last UpdatedBias Distribution39% Right
Bias Distribution
- 39% of the sources lean Right
39% Right
L 28%
C 33%
R 39%
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