99% of our data runs through them: the new plan to protect Britain's undersea cables
What happened
On 22 October 2026 the government published a White Paper setting out how it wants to protect the cables and pipelines that run along the seabed around Britain. It opens a 12-week public consultation. The headline change is on punishment. Anyone who intentionally damages critical undersea energy or telecoms infrastructure could face up to 14 years in prison. Unlimited fines are also proposed, including for ship owners whose vessels cause damage. The plan has four parts. It would modernise the criminal law on harmful conduct against undersea infrastructure, with new offences and new enforcement powers. It would place statutory security and resilience duties on subsea telecoms cable providers, so they have to identify and manage risks to their own networks. It would give the Secretary of State a national security direction power over subsea telecoms providers and repair capabilities, where that is necessary and proportionate. And it would create rules for sensing technology fitted to subsea fibre-optic cables, which can detect activity at sea but could be a security risk if the data fell into the wrong hands. Telecoms Minister Ian Murray MP said: "Undersea cables are the hidden backbone of modern Britain." He noted that the laws protecting these connections date back more than a century. The legislation being replaced is around 140 years old.
Why this matters
Three numbers explain why a seabed cable is a national issue rather than a technical one. Around 99% of the UK's international data travels through undersea cables. Undersea pipelines supply 74% of the UK's gas. And undersea electricity cables bring in supply from Europe as well as carrying power from the growing offshore wind fleet. So almost everything we now treat as ordinary runs through them. Card payments. NHS systems. Phone calls. Bank transfers. The heating. Not as a backup, as the main route. Energy Minister Michael Shanks said: "Undersea pipelines and cables are critical to keeping energy flowing to homes and businesses across the UK." Security Minister Dan Jarvis put it more simply: "Protecting them is vital to our national security." The government also announced on the same day that a new subsea cable factory will support national energy security. Being able to make and repair cables yourself matters: if a cable breaks and you have to wait for someone else's ship and someone else's spare, you are not really in control of your own grid.
What the evidence actually says
It would be easy to read "14 years in prison" and assume Britain's internet is hanging by a thread. The government's own documents are more measured, and the detail is worth having. First, the network is described as already highly resilient. There are many cables, and traffic can be rerouted. A single fault does not take the country offline. Second, most faults are accidents, not attacks. The common causes are anchors or trawler nets dragged across cables, environmental hazards such as undersea landslides, and plain technical failure. That is why the proposals cover negligent and reckless damage as well as deliberate damage, and why unlimited fines for ship owners are part of the package. A ship that drags its anchor through a cable does the same harm whatever the intention. Third, the security concern is real but specific. The government says suspicious activity around critical undersea infrastructure is increasingly being observed, and points to April this year, when the British Armed Forces exposed a covert Russian submarine operation in and around UK waters. It is also worth being clear about what this announcement is and is not. It is a White Paper and a consultation, not a law. Nothing here is in force yet. The 12-week consultation is the point at which cable operators, shipping companies, fishing organisations and the public get to say whether the proposals will actually work.
Practical advice
This is mostly a matter for government and industry, but there are a few sensible takeaways for ordinary readers and small businesses. **If you have something to say, the consultation is open for 12 weeks.** Consultations on technical subjects often get very few responses from outside the industry, which means the people who do reply have real influence. Fishing crews, boat owners and coastal businesses in particular know things about seabed activity that officials do not. **Do not rely on a single connection for anything critical.** The national network is resilient, but your own line is not. If your business or your care arrangements depend on being online, a mobile data backup is cheap insurance. **Keep an offline route for the things that matter.** Know your GP's phone number without looking it up. Keep a paper list of medicines. Know how to get help if your phone and broadband both stop. **If you see something odd near coastal infrastructure,** report it rather than filming it. In the UK you can report suspicious activity to the police on 101, or 999 in an emergency.
What to know
The government has published a White Paper proposing up to 14 years in prison and unlimited fines for damaging Britain's undersea cables and pipelines, replacing legislation about 140 years old. It would also put security duties on cable providers, create a national security direction power, and regulate sensing technology on fibre-optic cables. Around 99% of UK international data and 74% of UK gas arrive this way. The network is already resilient and most faults are accidents, but the government points to increasing suspicious activity at sea. A 12-week consultation is now open. Sources: GOV.UK, "Subsea cable saboteurs face jail and unlimited fines under new security crackdown", 22 October 2026, https://www.gov.uk/government/news/subsea-cable-saboteurs-face-jail-and-unlimited-fines-under-new-security-crackdown; GOV.UK, "National energy security supported by new subsea cable factory", 22 October 2026, https://www.gov.uk/government/news/national-energy-security-supported-by-new-subsea-cable-factory. This article is for general information only. It is not legal, financial or medical advice. For anything about your own health or medicines, speak to a doctor, pharmacist or other qualified healthcare professional.
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