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Britain to step up subsea cable protection on rising Russian threat

Published by Global Banking & Finance Review

Posted on May 29, 2026

2 min read

· Last updated: May 29, 2026

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UK Targets Stronger Laws to Protect Subsea Cables from Russian Interference

Britain Proposes Tougher Penalties and Measures for Subsea Cable Protection

By Paul Sandle

LONDON, May 29 (Reuters) - Britain said shipowners and operators who recklessly damaged subsea internet cables could face tougher penalties, including prison sentences, under proposals to help deter Russia and other hostile states from sabotaging vital national infrastructure.

The Importance of Subsea Cables to the UK

Subsea cables carry over 99% of international data traffic, underpinning more than £1.4 trillion in British financial transactions daily as well as calls, messaging and other internet services.

Recent Russian Activities and UK Response

Last month, Britain said it had exposed a covert Russian submarine operation in and around UK waters that was a bluff to hide other specialist vessels active near critical underwater infrastructure.

Government Statements and Legislative Overhaul

Telecoms minister Liz Lloyd said Britain had strong military capabilities to protect cables, but overhauling 140-year-old legislation would remove a legal "grey zone" around suspected malicious activity to increase deterrence.

Speech Highlights and Planned Actions

"As hostile activity by Russia and others grows, protecting these cables matters more than ever for our economy, security and daily lives," she said in a speech at the Royal United Services Institute on Friday. 

"That is why we plan to go further with tougher penalties for reckless damage, stronger security obligations and new powers to respond quickly when incidents happen." 

Russian Denials and Expanded Legal Coverage

Russia has previously denied British claims that it had targeted or threatened subsea cables.

Lloyd said sabotage by a hostile state already carried a penalty of life imprisonment for those involved, but the new laws would cover the use of proxies by state actors and reckless damage.

Collaborative Measures and Industry Consultation

The government would also work with cable operators and owners to reduce accidental damage arising from fishing activity or vessels dragging anchors, which accounted for nearly all cable outages, she said.

It was consulting the industry on establishing a British-flagged repair ship to increase resilience, Lloyd said, adding that a decision would be made later this year.

Environmental Considerations and Future Steps

The government would also review environmental red tape to speed up the laying of new cables, particularly in deep waters where the impact on marine life was extremely limited, she added.

(Reporting by Paul Sandle; Editing by Kirsten Donovan)

Key Takeaways

  • Subsea cables carry over £1.4 trillion in UK daily financial transactions and support nearly all international internet traffic, highlighting their strategic importance (gov.uk).
  • Britain plans to update outdated 140‑year‑old laws to impose stronger penalties—including jail—and introduce security obligations and emergency response powers for subsea cable incidents (gov.uk).
  • Recent Russian undersea activity—including a covert submarine operation tracked by UK forces—has heightened urgency, prompting consultations on British‑flagged repair ships and regulatory streamlining for cable deployment (gov.uk)

References

Frequently Asked Questions

Why is Britain increasing protection for subsea cables?
Britain is stepping up protection due to growing threats from Russia and other hostile states targeting critical national infrastructure.
What penalties could shipowners face for damaging subsea cables?
Shipowners and operators could face tougher penalties, including prison sentences, for reckless damage to subsea cables.
How important are subsea cables to the UK’s financial system?
Subsea cables carry over £1.4 trillion in financial transactions daily, supporting the UK economy and communications.
What other measures is the UK government considering?
Measures include working with cable operators to prevent accidental damage, reviewing environmental rules, and consulting on a British-flagged repair ship.
Has Russia responded to the UK's claims about subsea cable threats?
Russia has previously denied British claims that it targeted or threatened subsea cables.

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