State-sponsored hackers have "probably compromised" the UK's energy industry. A leaked memo from the National Cybersecurity Centre (NCSC) identifies links "from multiple UK IP addresses to infrastructure associated with advanced state-sponsored hostile threat actors." These threats are "known to target the energy and manufacturing sectors," the document says.

The memo, obtained by Motherboard and verified by a number of sources, goes on to say that as a result of these connections, "a number of industrial control system engineering and services organisations are likely to have been compromised." The NCSC has neither confirmed nor denied the authenticity of the memo. However, in a statement given to the BBC it said: "We are aware of reports of malicious cyber-activity targeting the energy sector around the globe ... We are liaising with our counterparts to better understand the threat and continue to manage any risks to the UK."