UK Proposes 14-Year Sentences for Undersea Cable Sabotage

By Tom Whitfield

The UK proposes prison terms of up to 14 years for intentionally compromising critical undersea infrastructure, alongside emergency powers to disable telecommunications services and compel access to sensitive cable sites.

A BBC report says the government has shared a policy paper setting out new criminal offenses and emergency powers for national security emergencies and possible future conflict. The document is a White Paper, the government’s term for a policy paper intended to support new legislation, so the measures remain proposals rather than enacted law. Interested parties can submit comments through an online questionnaire until January 14, 2027.

What does the White Paper change?

The government’s paper says the UK is “highly dependent” on undersea infrastructure owned by private-sector companies. It describes connectivity as resilient and says faults rarely cause noticeable disruption to data or energy availability. The same document says accidents and potential sabotage remain material risks.

Government policy responds to what the paper calls “threats to the homeland from state actors are increasing.” The government also says critical national infrastructure, including undersea cables and pipelines, continues to be a target. That combination supports a legal regime covering preparation and disruption, not only accidental damage.

The proposed offenses would cover:

• Causing a security compromise to critical undersea infrastructure.
• Physical and non-physical interference, including remote electronic interference and cyber activity.
• Certain preparatory conduct directed at compromising infrastructure.
• Obstructing repairs or failing to preserve evidence when requested.

The proposal then links those offenses to three levels of culpable conduct:

• Up to 14 years’ imprisonment for intentional conduct.
• Up to 10 years for reckless conduct.
• Up to two years for grossly negligent conduct.

The government also proposes potentially unlimited fines. It is considering a higher maximum penalty for more serious cases and has not settled whether the rules apply only within UK national waters or further afield. These remain consultation choices. In plain terms, the government seeks tougher penalties and broader coverage, while the geographic reach remains open.

What powers would ministers gain?

During a national emergency, ministers would gain two operational powers:

• Order telecommunications companies to remove or disable services.
• Compel those companies to grant officials access to sensitive sites, including cable landing stations.

The first power creates a direct government lever over service continuity. The second would place officials inside facilities controlled by private operators. The criminal rules would target people who threaten infrastructure, while the emergency rules would give ministers control over services during a national emergency. In short, the framework combines criminal enforcement with government control of service continuity.

Why are Russian trawlers central?

Reports cited by the BBC say Russia has used commercial fishing trawlers to map undersea cables. The figure presented this week is 500 incidents of Russian boats loitering over cables during the previous four and a half years. Those reports do not establish 500 successful attacks or even 500 confirmed attempts to damage a cable.

That distinction matters because the proposed law covers completed interference, cyber activity and preparatory conduct. A vessel hovering over a cable may indicate mapping or surveillance, but the source does not convert every loitering event into sabotage.

In September, reports suggested that NATO allies had foiled a Russian training exercise in Norway involving what reports called a secret weapon against undersea cables. In January, Royal Navy attack helicopters chased off a Russian ship loitering less than a mile from five undersea cables in UK waters. The government counted that January encounter among the 500 incidents.

Russia has also made several efforts to map and plan attacks against European cables, according to the report. The political context reaches back to the Salisbury Novichok poisonings in 2018, while relations with Russia deteriorated further after the invasion of Ukraine in 2022. The evidence cited points to repeated mapping and suspicious loitering, not a settled record of 500 cable attacks.

What happens next?

The unresolved questions include the final maximum above 14 years, the geographic reach of the offenses and the detailed use of emergency service-control powers. Operators would also need to consider the effects of new rules covering repairs, evidence preservation and official access.

The consultation closes January 14, 2027, after which the balance among operator liability, service continuity and government control should become clearer. Until then, the proposed penalties and emergency authority remain policy options rather than operating rules.