Confidential inspection files have revealed that radioactive water escaped from the UK’s nuclear weapons storage facility at Coulport into Loch Long, a sea loch near Glasgow, Scotland.
The leaks were traced to neglected maintenance of a network of about 1,500 water pipes, many well past their design life.
In particular, a major incident in August 2019 saw tritium-contaminated water flood through a weapons processing area into the loch.
While tritium levels were low and considered non-harmful, regulators described the incidents as avoidable and criticised the Ministry of Defence’s asset management failures.
The files were released only after a six-year battle to secure public access.

German Chancellor Says a Ceasefire Must Be Agreed at the Alaska Summit
German Chancellor Friedrich Merz has called on Russian President Vladimir Putin to agree to a ceasefire at the upcoming summit in Alaska. Merz emphasized that any such summit