8 instances of radioactive material incidents in the UK since 2015

20 Working Days, Tom Pashby, Sep 21, 2026, https://tompashby.substack.com/p/8-instances-of-radioactive-material?utm_source=post-email-title&publication_id=6735486&post_id=216635328&utm_campaign=email-post-title&isFreemail=true&r=ln98x&triedRedirect=true&utm_medium=email

There were eight instances of nuclear or radioactive materials being lost, stolen or otherwise out of regulatory control in the past 10 years in the UK, according to data released to 20 Working Days.

The data, released by the Home Office, was already reported voluntarily by the UK Government to the International Atomic Energy Agency’s (IAEA’s) Incident and Trafficking Database (ITDB), which publishes aggregated data annually.

The IAEA Incident and Trafficking Database (ITDB): 2026 factsheet explained: “When originally established, the ITDB recorded incidents of illicit trafficking of nuclear and 145 participating States other radioactive material.

“Its scope was later expanded to include all incidents in which nuclear and other radioactive material is or was out of regulatory control.

“The ITDB scope covers all types of nuclear material as defined by the Statute of the Agency (i.e. uranium, plutonium and thorium), naturally occurring and artificially produced radioisotopes and radioactively contaminated material, such as scrap metal.”

It found that, as of the 2026 report: “The trafficking or malicious use intent of 86.6% of thefts remains undetermined.”

“In 2025, 236 incidents were reported to the ITDB by 34 States, an increase of 89 incidents from 2024,” it said.

“The noticeable increase in reported incidents in 2025 is primarily attributable to retrospective reporting.”

The factsheet also reported that “transport remains a key vulnerability, with over half of all thefts since 1993 — and approximately 70% in the past decade — occurring during authorised transport, underscoring the need for sustained attention to transport security measures.”

Under a section titled “Confidentiality and security of ITDB information”, the factsheet said: “The ITDB is a resource for information sharing among State authorities and the IAEA.

“In order to protect the confidentiality of information reported by States, the IAEA upholds strict procedures for handling and dissemination of sensitive ITDB information.

“Information on reported incidents is only communicated via the PoC (points of contact) network. Access to the complete database is limited to a small number of IAEA staff.”

20 Working Days asked the UK Home Office for the UK’s submissions to the database since 2015.

In response, the Home Office listed eight incidents it had reported to the database. It provided the following table: [on original]

It is unclear whether all of the incidents were disclosed to the public.

The list does, however, include one of the highest profile incidents in the UK involving radioactive materials – the malicious use of Polonium-210 which resulted in the lethal poisoning of Alexander Litvinenko in 2006.

The Litvinenko inquiry: report into the death of Alexander Litvinenko was published in 2016, which may explain why the incident was listed as 2016 by the Home Office.

Meanwhile, the 2021 incident of F-18 being lost and found appears to have been reported by the PA news agency in the same year.

The Home Office was approached for comment.

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