UK Plans Tougher Laws for Subsea Internet Cables

If you imagine the internet as something weightless, this speech asks you to look down. In a speech at RUSI, Liz Lloyd argued that the UK needs tougher protections for subsea internet cables, the fibre-optic lines on the seabed that carry international payments, business data and huge amounts of everyday online traffic. She framed the issue with a striking piece of history. In the same institute 126 years earlier, naval officer Carlyon Bellairs asked how Britain could make its undersea cables safer and more resilient. The technology is different now, Lloyd said, but the basic problem is not. You cannot remove risk from the ocean floor, so you have to build a system that can take a hit and recover quickly.

Lloyd organised the speech around three ideas: growth, deterrence and security. The first can sound a little dry, so it helps to translate it. In plain English, her argument is that the UK is safer when it has more cable capacity, more investment, better repair options and rules that do not slow every upgrade. That matters because these cables are not a niche bit of tech. They carry cross-border trade, financial transfers and the data that lets businesses in Britain work with the rest of the world. Lloyd also tied them to artificial intelligence, saying the government expects private firms to invest tens of billions of pounds in UK AI infrastructure and that all of that computing power still depends on data moving through cables beneath the sea.

From there, the speech moved to a very practical point: much of the network landing in the UK was laid about twenty years ago, during the first major data-centre boom. If Britain wants more capacity and newer routes, ministers say they need to make construction and maintenance easier. Lloyd said the government is reviewing the legislative framework and wants to exempt the laying, maintenance and removal of subsea cables from unnecessary requirements where the impact is limited, especially in deep water. That is a political choice as much as a technical one. The government is presenting quicker approvals not simply as help for business, but as part of national resilience. You may not agree with every line ministers draw, but the speech makes the logic plain: if cable systems are critical, delays to replacing or repairing them become a security issue as well as an environmental or planning one.

Another detail in the speech brings that argument into focus. Lloyd said that when a cable breaks in UK waters, a repair vessel is usually on site within eight days, which she described as a world-leading response time. She said ministers are now carrying out market work on how to keep a UK-based, UK-flagged sovereign repair capability in place for the long term, with a final decision expected by the end of the year. **What this means:** resilience is not only about stopping threats. It is also about having the ships, skills and spare capacity to fix problems quickly. Lloyd linked that thinking to the National Wealth Fund and to the £600 million deal for Eastern Green Link 4, a 530-kilometre subsea electricity link under the North Sea, as an example of government backing the kinds of sectors it sees as vital.

The second pillar was deterrence. Lloyd pushed back against the idea that undersea cables are sitting defenceless in the dark. She said the UK and its allies watch for threats and pointed to the Defence Secretary's statement that Russian submarines operating in UK waters had been tracked while surveying cable routes. Her point was partly military and partly technical. On the military side, the message was that hostile states should know they can be seen. On the technical side, Lloyd said newer sensing systems could turn cables from passive carriers of data into tools that also help spot changes on the seabed, detect interference and give warning before a disruption becomes a crisis.

The speech also focused on a harder problem: activity that sits between accident and open attack. Lloyd said the present legal framework does not keep pace with that kind of behaviour, especially when intent is murky and proof is difficult. Some of the laws still relied on in this area, she noted, are extremely old and were written for a very different world. **What 'grey zone' means:** it describes acts that are hostile or reckless but stop short of declared conflict. Lloyd said the government will consult on new legislative proposals to modernise the criminal law in this area, making it clearer and tougher for anyone who deliberately targets cables or acts with reckless disregard for them.

The third pillar was security, and here the speech became more grounded. Lloyd acknowledged that most cable breaks are not acts of sabotage. They are usually caused by natural seabed movement or by anchors dragged across the sea floor. That matters because good policy starts with the most common risks, not just the most dramatic ones. For that reason, she formally backed the European Subsea Cables Association's new Fishing Liaison Guidelines, developed with government, industry and the fishing sector. The aim is simple: share information, reduce accidental damage and help two important maritime industries work in the same waters more safely.

Security, in Lloyd's account, also means protecting the places where cables come ashore. These landing stations may sound technical, but they are bottlenecks where power systems and data equipment keep the wider network running. She said the government is working with the National Protective Security Authority and the National Cyber Security Centre on updated physical and cyber-security guidance for operators, and that ministers intend to consult on further measures requiring risk management, response plans and fast incident reporting across the network. The speech then looked ahead. Analysis with The Crown Estate suggests the UK will need significantly more cable capacity by 2035, so ministers say they are mapping and protecting seabed space for future routes while trying to avoid dangerous choke points. Lloyd also said the UK is working closely with Ireland on aligned response plans and a joint exercise for major cable disruption. The bigger lesson for us is simple: the internet is not just apps and screens. It is a physical system, shaped by law, repair work, trade and international cooperation, and once you see that, this story becomes much easier to understand.