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Nuclear Leaks

An investigation into the UK's Sellafield nuclear waste dump, examining the security and safety of one of the most sensitive and hazardous sites in Europe

2 October 2024

  • Sellafield illustration

    Sellafield ordered to pay nearly £400,000 over cybersecurity failings

    Nuclear waste dump in Cumbria pleaded guilty to leaving data that could threaten national security exposed for four years, says regulator

8 August 2024

  • Photo montage and graphic tinted in red of the Sallafield plant and its central dome

    Sellafield apologises after guilty plea over string of cybersecurity failings

    Nuclear site awaits sentencing over breaches that it admitted could have threatened national security

21 June 2024

  • Sellafield’s lawyers have said that cybersecurity requirements were not ‘sufficiently adhered to for a period’.

    Sellafield pleads guilty to criminal charges over cybersecurity failings

    UK nuclear site pleads guilty to IT security breaches from 2019 to 2023

28 March 2024

  • A general view of Sellafield nuclear processing plant in Cumbria

    Sellafield nuclear waste dump to be prosecuted for alleged cybersecurity offences

    Charges relate to four-year period between 2019 and early 2023, and follow Guardian investigation

27 March 2024

  • Sellafield, formerly known as Windscale, a multi-function nuclear site (primarily nuclear waste processing, storage and nuclear decommissioning). Nuclear power generation took place at Sellafield between 1956 and 2003. Seascale, Cumbria. Photograph by David Levene 1/12/23

    Sellafield’s head of information security to step down

    Richard Meal is second senior leader to depart following Guardian investigation into failings at UK nuclear waste site

15 February 2024

  • Sellafield nuclear site with the town of Seascale in the foreground.

    Spending watchdog launches investigation into Sellafield

    National Audit Office to examine risks and costs at nuclear waste site in Cumbria

8 January 2024

  • Sellafield nuclear waste site

    Sellafield nuclear safety and security director to leave

    Multiple safety and cybersecurity failings at nuclear waste site were revealed by Guardian last month

31 December 2023

  • large metal dome and another building

    Cyber-hackers target UK nuclear waste company RWM

    Radioactive Waste Management says attempt was made to breach the business using LinkedIn

19 December 2023

  • Sellafield nuclear power station

    GMB union says urgent action needed to tackle safety concerns at Sellafield

    Guardian investigation has revealed areas that need attention at nuclear site in Cumbria

8 December 2023

  • Sellafield, with cows

    Sellafield: Europe’s most toxic nuclear site

    The Guardian’s investigation into safety concerns at Europe’s most hazardous nuclear plant

6 December 2023

  • The Sellafield nuclear site

    UK nuclear revelations: how bad could they get and could they affect the US and Europe?

    Key things to know about hacking, radioactive leaks and toxic workplace culture at Sellafield, Europe’s most hazardous nuclear site
  • Sellafield cooling towers overlaid on a man walking to work and phone sending messages

    Sellafield nuclear site workers claim ‘toxic culture’ of bullying, sexual harassment and drugs could put safety at risk

    Exclusive: Multiple sources warn poor working culture heightens risk of accidents, suicide and sabotage
  • Police officers surrounded by Whatsapp messages with the Sellafield cooling towers in the background

    UK nuclear police and workers share WhatsApp jokes about paedophilia, racism and homophobia

    Exclusive: Work-linked WhatsApp groups include abusive comments about political figures and television personalities

5 December 2023

  • A pixellated and tinted photo of Sellafield nuclear processing plant in Cumbria, overlaid with a grid

    UK minister demands answers for security failings at Sellafield

  • Sellafield nuclear site image

    ‘Dirty 30’ and its toxic siblings: the most dangerous parts of the Sellafield nuclear site

  • Homes lie in the shadow of the Sellafield Nuclear power plant, pictured with its former cooling towers, near Seascale.

    Revealed: Sellafield nuclear site has leak that could pose risk to public

  • The thermal oxide reprocessing plant at Sellafield. The storage pond contains rows of huge bottles of spent nuclear fuel

    Ministers pressed by Labour over cyber-attack at Sellafield by foreign groups

4 December 2023

  • The Sellafield nuclear processing plant in Cumbria with the former cooling towers.

    Sellafield: ‘bottomless pit of hell, money and despair’ at Europe’s most toxic nuclear site

    Described as a nuclear Narnia, the site is a source of economic support for Cumbria – and a longstanding international safety concern
  • Sellafield nuclear processing plant and the Magnox reprocessing area with pixelated data leaking out.

    Sellafield nuclear site hacked by groups linked to Russia and China

    Exclusive: Malware may still be present and potential effects have been covered up by staff, investigation reveals

  • Nuclear Narnia: why is Sellafield Europe's most dangerous industrial site?

    A Guardian investigation can reveal that Sellafield has failed to contain numerous threats — including a cyber security breach by groups linked to Russia and China, and growing physical cracks in its ‘most hazardous facility’
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