The UK’s nuclear energy regulator has notified state-owned Sellafield Ltd that it will be prosecuted for alleged information technology security offences during a four-year period between 2019 and early 2023.

The Office for Nuclear Regulation (ONR) said there is no suggestion that public safety has been compromised as a result of these issues.

The decision to begin legal proceedings follows an investigation by the ONR.

A statement said details of the first court hearing will be announced when available.

The statement added: “Given that some matters are now subject to legal proceedings, we are unable to comment further.”