23rd October 2026
The UK Government is planning tougher laws to protect the undersea cables and pipelines that keep Britain connected to the world, with offenders potentially facing prison sentences of up to 14 years and unlimited fines.
Announced on 22 October, the proposals aim to bring outdated legislation into line with modern security threats, including suspected hostile activity around critical infrastructure in UK waters.
Much of Britain’s digital lifeline lies beneath the sea. Undersea fibre-optic cables carry around 99% of the country’s international data traffic, supporting everything from online banking and shopping to business communications. Subsea pipelines supply around 74% of the UK’s gas, while electricity interconnectors help move power between Britain and other countries.
Damage to these connections could cause serious disruption to businesses, households and essential services.
The Government says existing laws are no longer adequate. Some of the legislation protecting undersea cables dates back to 1885, when telegraph communications were the technology of the day. The legal framework does not properly reflect the importance of modern internet cables, electricity links and energy pipelines.
Under the proposed changes, deliberately damaging critical undersea infrastructure could carry a maximum prison sentence of 14 years. Reckless damage could attract up to 10 years, while grossly negligent conduct could carry up to two years. Unlimited fines would also be available.
The plans go beyond punishment. Telecommunications cable operators would face stronger legal duties to identify risks, improve security, prepare for incidents and restore services following disruption. The Government also wants powers to direct providers to take action where national security requires it.
The proposals follow growing concern about suspicious activity around undersea infrastructure, including the tracking of Russian submarines operating near critical cables in and around UK waters.
However, the Government acknowledges that most cable faults are not deliberate acts of sabotage. Accidents involving ships’ anchors and fishing equipment, environmental hazards and technical failures can all damage cables. The challenge is to strengthen security without treating ordinary maritime accidents as hostile acts.
For Scotland and the wider north of the UK, the issue is particularly relevant. Undersea connections are important to island communities, offshore energy developments and communications between mainland Britain and other countries. Any major disruption could affect businesses and services far beyond the immediate location of a damaged cable.
The Government has launched a 12-week public consultation on the proposals, inviting views from industry, maritime organisations, experts and the public before legislation is finalised.
Protecting infrastructure that most people rarely think about has become an increasingly important part of national security. The cables may be hidden beneath the sea, but the consequences of losing them could quickly become visible on shore.
Source: UK Government announcement and consultation, 22 October 2026.