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Rise in nuclear incidents that could leak radioactivity
There have been 12 nuclear incidents that could have leaked radioactivity at the Faslane naval base since 2023, The Ferret can reveal.
According to the Ministry of Defence (MoD), the incidents at the Clyde nuclear submarine base had "actual or high potential for radioactive release to the environment".
But the MoD has refused to say what actually happened in any of the incidents, or exactly when they occurred. There were five in 2023, four in 2024 and three in the first four months of 2025 - the highest for 17 years.
Campaigners warned that a "catastrophic" accident at Faslane could put lives at risk. The Trident submarines based there were a "chronic national security threat to Scotland" because they were "decrepit" and over-worked, they claimed.
New figures also revealed that the total number of nuclear incidents categorised by the MoD at Faslane, and the neighbouring nuclear bomb store at Coulport, more than doubled from 57 in 2019 to 136 in 2024. That includes incidents deemed less serious by the MoD.
The Scottish National Party (SNP) described the rising number of incidents as "deeply concerning". It branded the secrecy surrounding the incidents as "unacceptable".
The MoD, however, insisted that it took safety incidents "very seriously". The incidents could include "equipment failures, human error, procedural failings, documentation shortcomings or near-misses", it said.
The latest figures on "nuclear site event reports" at Faslane and Coulport were disclosed in a parliamentary answer to the SNP's defence spokesperson, Dave Doogan MP. They show that a rising trend of more serious events - first reported by The Ferret in April 2024 - is continuing.
Alarm over nuclear safety lapses on the Clyde
There was one incident at Faslane between 1 January and 22 April 2025 given the MoD's worst risk rating of "category A". There was another category A incident at Faslane in 2023.
The MoD has defined category A incidents as having an "actual or high potential for radioactive release to the environment" in breach of safety limits.
The last category A incident reported by the MoD was in 2008, when radioactive waste leaked from a barge at Faslane into the Clyde. There were spillages from nuclear submarines at the base in 2007 and 2006.
There were also four "category B" incidents at Faslane in 2023, another four in 2024 and two in the first four months of 2025. The last time that many category B incidents were reported in a year was 2006, when there were five.
According to the MoD, category B meant "actual or high potential for a contained release within building or submarine", or "actual or high potential for radioactive release to the environment" below safety limits.
The MoD also categorised nuclear site events as "C" and "D". C meant there was "moderate potential for future release to the environment", or an "actual radioactive release to the environment" too low to detect. D meant there was "low potential for release but may contribute towards an adverse trend".
The number of reported C incidents at Faslane and Coulport increased from six in 2019 to 38 in 2024, while the number of D incidents rose from 50 to 94.
At the same time the number of incidents described by the MoD as "below scale" and "of safety interest or concern" dropped from 101 to 39.
The SNP's Dave Doogan MP, criticised the MoD in the House of Commons for the "veil of secrecy" which covered nuclear incidents. Previous governments had outlined what happened where there were "severe safety breaches", he told The Ferret.
"The increased number of safety incidents at Coulport and Faslane is deeply concerning, especially so in an era of increased secrecy around nuclear weapons and skyrocketing costs," Doogan added.
"As a bare minimum the Labour Government should be transparent about the nature of safety incidents at nuclear weapons facilities in Scotland, and the status of their nuclear weapons projects. That the Scottish Government, and the Scottish people, are kept in t...
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There have been 12 nuclear incidents that could have leaked radioactivity at the Faslane naval base since 2023, The Ferret can reveal.
According to the Ministry of Defence (MoD), the incidents at the Clyde nuclear submarine base had "actual or high potential for radioactive release to the environment".
But the MoD has refused to say what actually happened in any of the incidents, or exactly when they occurred. There were five in 2023, four in 2024 and three in the first four months of 2025 - the highest for 17 years.
Campaigners warned that a "catastrophic" accident at Faslane could put lives at risk. The Trident submarines based there were a "chronic national security threat to Scotland" because they were "decrepit" and over-worked, they claimed.
New figures also revealed that the total number of nuclear incidents categorised by the MoD at Faslane, and the neighbouring nuclear bomb store at Coulport, more than doubled from 57 in 2019 to 136 in 2024. That includes incidents deemed less serious by the MoD.
The Scottish National Party (SNP) described the rising number of incidents as "deeply concerning". It branded the secrecy surrounding the incidents as "unacceptable".
The MoD, however, insisted that it took safety incidents "very seriously". The incidents could include "equipment failures, human error, procedural failings, documentation shortcomings or near-misses", it said.
The latest figures on "nuclear site event reports" at Faslane and Coulport were disclosed in a parliamentary answer to the SNP's defence spokesperson, Dave Doogan MP. They show that a rising trend of more serious events - first reported by The Ferret in April 2024 - is continuing.
Alarm over nuclear safety lapses on the Clyde
There was one incident at Faslane between 1 January and 22 April 2025 given the MoD's worst risk rating of "category A". There was another category A incident at Faslane in 2023.
The MoD has defined category A incidents as having an "actual or high potential for radioactive release to the environment" in breach of safety limits.
The last category A incident reported by the MoD was in 2008, when radioactive waste leaked from a barge at Faslane into the Clyde. There were spillages from nuclear submarines at the base in 2007 and 2006.
There were also four "category B" incidents at Faslane in 2023, another four in 2024 and two in the first four months of 2025. The last time that many category B incidents were reported in a year was 2006, when there were five.
According to the MoD, category B meant "actual or high potential for a contained release within building or submarine", or "actual or high potential for radioactive release to the environment" below safety limits.
The MoD also categorised nuclear site events as "C" and "D". C meant there was "moderate potential for future release to the environment", or an "actual radioactive release to the environment" too low to detect. D meant there was "low potential for release but may contribute towards an adverse trend".
The number of reported C incidents at Faslane and Coulport increased from six in 2019 to 38 in 2024, while the number of D incidents rose from 50 to 94.
At the same time the number of incidents described by the MoD as "below scale" and "of safety interest or concern" dropped from 101 to 39.
The SNP's Dave Doogan MP, criticised the MoD in the House of Commons for the "veil of secrecy" which covered nuclear incidents. Previous governments had outlined what happened where there were "severe safety breaches", he told The Ferret.
"The increased number of safety incidents at Coulport and Faslane is deeply concerning, especially so in an era of increased secrecy around nuclear weapons and skyrocketing costs," Doogan added.
"As a bare minimum the Labour Government should be transparent about the nature of safety incidents at nuclear weapons facilities in Scotland, and the status of their nuclear weapons projects. That the Scottish Government, and the Scottish people, are kept in t...