Why the UK wants to jail undersea cable saboteurs and why tougher punishment may not be enough

The United Kingdom is considering imposing severe penalties for those who deliberately sabotage undersea cables and pipelines, potentially including up to 14 years in jail and unlimited fines, according to a recent statement. These proposed changes, which would update outdated 1885 legislation, would also impose stricter security obligations on cable operators and grant the government enhanced powers to counter national security threats.

The UK government cites increasing geopolitical tensions and suspicious Russian activities in European waters as the driving force behind these proposed measures. Over the past few years, a series of incidents in European waters have highlighted the vulnerability of critical undersea infrastructure. These include the 2022 sabotage of the Nord Stream pipeline, the 2023 damage to the Baltic connector gas pipeline, and several undersea cable failures in the Baltic Sea in 2024.

While fibre-optic cables that transmit over 99% of intercontinental internet traffic worldwide are designed to reroute data when a cable is severed, a failure can still lead to slower online payments, banking services, and other applications requiring reliable connectivity. However, industry experts warn that simply imposing harsher penalties may not be enough to ensure network resilience.

RetN CEO Tony O Sullivan notes that laying additional cables along the same routes can create "fake diversity" problems, as multiple connections may converge at the same points, making them susceptible to simultaneous damage. Expanding the number of routes, both undersea and on land, is essential to reduce the risk of a single incident crippling multiple connections, Sullivan argues.

While the UK government is currently consulting on its proposed legislation until January 14, 2027, other European countries are also taking steps to bolster their underwater networks. Denmark is developing advanced surveillance systems to monitor critical cables and pipelines for potential threats, and the European Commission announced a €347 million investment in strategic submarine cable projects, including €20 million to enhance repair capabilities in the Baltic Sea.