North Atlantic Submarine Activity

Judith Cummins Excerpts

Monday 13th April 2026 Commons Chamber

[The Minister for the Armed Forces (Al Carns)]

With permission, Madam Deputy Speaker, I wish to make a statement on north Atlantic activity. Let me begin by thanking the many members of our armed forces who are currently deployed in over 30 operations across the globe. Their efforts are often unseen by the British people, but they are always appreciated. They defend the very freedoms that we enjoy.

Last week, my right hon. Friend the Defence Secretary revealed details of one such operation. While the focus of many has been drawn to the middle east, UK armed forces, in partnership with our allies, have been deployed to deter the increased Russian activity that we have witnessed in the Atlantic. The specific operation involved a Russian Akula-class submarine and a concurrent deployment of two specialist submarines from GUGI—Russia’s main directorate of deep-sea research.

Last November, the Defence Secretary outlined to the House how GUGI vessels, including the spy ship Yantar, are directed by President Putin to engage in hybrid warfare activities against the UK and its allies, specifically around critical undersea infrastructure. Their mission is to survey pipelines and cables during peacetime and then potentially, if required, sabotage them in conflict.

In response to the Russian subsurface activity, the Defence Secretary deployed a Royal Navy warship and a Royal Air Force P8 aircraft alongside allies and partners to ensure that the Russian vessel was monitored during every phase of the operation. The Akula subsequently retreated home, having been closely tracked throughout, and we continued to monitor the two GUGI submarines when they were in and around UK waters and, of course, beyond. Our armed forces left them in no doubt that they were being monitored, that their movements were not covert as planned, and that their attempted secret operation had been exposed. The two GUGI submarines have now left UK waters and headed back north, and this operation, which lasted more than a month, has now concluded.

In often treacherous conditions, our pilots racked up over 450 flying hours and our frigates sailed several thousand nautical miles. Some 500 British personnel were involved in the response. I know that the whole House will join me in paying tribute to every single person involved.

We exposed this military operation undertaken by Russia for three key reasons: first, to send a message to Putin that he failed to remain covert, and that any attempt to damage critical undersea infrastructure will not be tolerated and cannot be denied; secondly, to demonstrate that even with significant capabilities and personnel deployed in the middle east, we will always do what is necessary to protect our homeland; and thirdly, to highlight a significant operation carried out by our armed forces, who met this challenge with the characteristic determination and professionalism that we all know too well.

This operation reminds us why the seabed matters, especially for the island nation of Britain: it connects us to everything, and that connection is sustained beneath our waters without interruption through a vast network of cables and pipelines on which much of our way of life relies—much of the gas that heats our homes, 99% of international telecoms and data traffic, and trillions of pounds of global trade each day. Because the seabed matters to us, it is a prime target for our adversaries.

The UK’s undersea network is highly resilient, but the threats are increasing, so we are stepping up our action to defend it, including by providing an extra £100 million for our vital P8 submarine-hunting aircraft; launching our Atlantic Bastion programme to combine the latest autonomous technologies with the best warships and aircraft to create a British-built hybrid naval force; and making the biggest sustained increase in defence spending since the cold war, after years of hollowing-out and underfunding by various Governments. The threat is clear, and our resolve to confront it is absolute. That is why this year we are deploying our carrier group where it is most needed—the north Atlantic and the High North—and supporting NATO’s new mission, Arctic Sentry.

I want to put on the record our thanks to our allies, with whom we have co-operated closely throughout this operation, including Norway. Our shared commitment to confront Russian aggression in the north Atlantic is at the heart of our Lunna House agreement, and together we are now building a combined fleet of new submarine-hunting frigates and new uncrewed systems.

Let me say a few words on Ukraine, from where I returned just last week. Today, two wars on two continents are being fought at the very same time. Putin wants us distracted while he steps up strikes on Ukraine relentlessly, and indeed at enormous scale, with around 7,000 attacks a day on the front line and 55,000 drone and missile strikes last year alone. We must always remember our duty to Ukraine and recognise that Russian aggression is growing across Europe once again.

Let me finish where I began, with praise for our people. We have the very finest armed forces that a nation could hope for. They are second to none. As I speak, we have personnel deployed across every domain, every moment of the day, in every part of the world. They are in constant confrontation with our adversaries, from the depths of the seabed to the reaches of space. When a crisis erupts, as it has done in the middle east, I understand people questioning why all UK military assets and personnel have not been sent to deal with it. But as demands on defence rise, we must deploy our resources to best effect across multiple priorities.

Because of our increase in defence investment, we will be able to call on more and more resources in the coming years. As we defend our interests and partners in the middle east, we will tackle increasing threats in the High North. We will stand with Ukraine. We will meet our NATO obligations. Above all, we will always fulfil the first duty of government: to protect our homeland and keep the British people safe. I commend this statement to the House.

[Madam Deputy Speaker (Judith Cummins)]

I call the shadow Minister.

--- Later in debate ---

[Al Carns]

We can agree that no sabotage took place this time from the Russian sub-surface activity off the coast of the UK. We have backed our words with action when it comes to deterring Russia, with £4.5 billion in UK military support to Ukraine last year and a total of £21.8 billion. The Ukraine defence contact group just raised an astonishing $45 billion to buy weapons, munitions and capability for the Ukrainians. The Ministry of Defence stands ready to board any vessels that meet the criteria—there is a lot of misinformation out there. Having very expensive frigates escorting every vessel at such range is putting significant demands on the Russian fleet and degrading its capabilities. Let me add that we have spent £5 billion extra this year alone on the defence budget, and by 2028-29 we will spend around £73 billion on it.

[Madam Deputy Speaker]

I call the Chair of the Defence Committee.

[Mr Tanmanjeet Singh Dhesi (Slough) (Lab)]

I thank the Minister for his statement and the Defence Secretary for his public statement, which have increased public awareness about the growing threats that our nation faces. On behalf of the Defence Committee, I pay tribute to all our armed forces personnel involved in disrupting the Russian activity around our critical undersea infrastructure. This incident underscores the growing threat that Russia poses, and the need to increase defence investment now and finally to publish the defence investment plan.

Turning to the incident itself, I take on board the Minister’s words, but it has been widely reported, including publicly at the London defence conference, that Putin had explosives planted on our undersea cables. For the record, can he confirm whether Russians were involved in either sabotage or precursors to sabotage on or around our undersea cables?

[Al Carns]

The reality is that Russia failed on this occasion, and it failed because we exposed its activity, which meant that there was no way, shape or form that it could deny its activity in the first place. I was at the London defence conference and I heard certain discussions about undersea cables. I can confirm that no sabotage took place this time, but the Russians put a lot of effort into mapping and understanding our undersea critical national infrastructure, and we will do everything to map, track and expose it, should it take place.

[Madam Deputy Speaker]

I call the Liberal Democrat spokesperson.

[Calum Miller (Bicester and Woodstock) (LD)]

I thank the Minister for advance sight of his statement, and I associate my party with his thanks and appreciation for the dedicated service of our armed forces personnel around the world.

While the world’s attention was on Trump and Netanyahu’s catastrophic war in Iran, Vladimir Putin was collecting vital information about our critical infrastructure. In response, the Defence Secretary told Putin, for the second time: “We see you.” But we need much greater confidence that the Government have the plan and resolve not just to observe Russia’s activities, but to meet and resist them, should that be required.

As Putin plans for future conflict, our Government appear frozen. Delay and inaction is sapping the confidence of industry and our allies, while enabling Putin’s war machine in Ukraine. The Government must remedy these failings as a matter of urgency. Our national security and the sovereignty of our Ukrainian allies demand it. Will the Minister commit to publishing the defence investment plan before Parliament is prorogued, and will he publish a plan to raise £20 billion in defence bonds to be spent on urgent projects, including rebuilding our naval capabilities, which are critical for protecting our undersea infrastructure?

The Minister rightly highlighted Russia’s continued assault on Ukraine. Péter Magyar’s spectacular victory in yesterday’s Hungarian elections should unlock European financial support to Ukraine. At just the same time, Donald Trump authorised a suspension of sanctions on Russian energy assets. The Government cannot allow this opportunity to slip, so will the Minister work with EU partners so that the UK’s £30 billion share of the frozen Russian assets in Europe can be sent to Ukraine’s defence alongside the promised €90 billion from the EU, and will he work with colleagues across Government finally to put an end to the scandal of UK companies providing maritime services for the export of Russian oil, gas and coal?