UK Unveils Atlantic Bastion to Counter Russian Submarines

UK Defence Secretary John Healey reported last month the presence of a Russian spy ship, Yantar, on the edge of UK waters, north of Scotland. The Yantar was accused by the British defence ministry of directing lasers at the pilots of Royal Air Force Boeing P-8 aircraft | Image: UK Ministry of Defence

The UK government has outlined the first phase of development for Atlantic Bastion, an undersea warfare programme intended to counter increasing Russian submarine activity and strengthen the protection of critical underwater infrastructure in the North Atlantic. The Ministry of Defence announced the initiative on December 08, describing it as a major transformation of Royal Navy anti-submarine capabilities and a core output of the Strategic Defence Review.

Defence Secretary John Healey introduced the programme during a visit to HM Naval Base Portsmouth, where early testing of new underwater sensor systems is underway. According to the Ministry of Defence, millions of pounds in investment have already been directed toward the development of autonomous platforms, artificial intelligence-enabled detection systems, and digital infrastructure designed to integrate with existing Royal Navy ships, submarines and Royal Air Force patrol aircraft.

Atlantic Bastion is being developed in response to what the Ministry called a resurgence in Russian submarine and underwater intelligence-gathering operations. This includes movements by the Russian vessel Yantar, which UK officials recently identified operating near British waters. UK Defence Intelligence has assessed that Russia is modernising its undersea forces with the ability to target critical infrastructure such as fibre-optic cables and pipelines.

Healey said, “People should be in no doubt of the new threats facing the UK and our allies under the sea, where adversaries are targeting infrastructure that is so critical to our way of life. This new era of threat demands a new era for defence, and we must rapidly innovate at a wartime pace to maintain the battlefield edge as we deliver on the Strategic Defence Review. Our pioneering Atlantic Bastion programme is a blueprint for the future of the Royal Navy.”

Industry participation has been described as significant, with £14 million in combined government–industry “seedcorn” funding enabling early trials. Twenty-six UK and European companies have submitted proposals for anti-submarine sensor systems, while 20 others are demonstrating technologies ranging from unmanned underwater vehicles to AI-supported tracking tools. Private investment is currently exceeding public funding at a 4:1 ratio, the ministry said.

Capabilities emerging from these demonstrations will move into development and testing in the coming weeks, with the first systems expected to enter the water next year. Further government investment is planned as part of a broader push to field a hybrid naval force blending crewed and uncrewed assets.

The First Sea Lord, General Sir Gwyn Jenkins, said, “We are a Navy that thrives when it is allowed to adapt. To evolve. We have never stood still – because the threats never do. The SDR identified the maritime domain as increasingly vulnerable – and that maritime security is a strategic imperative for the UK. It is time to act. This begins with Atlantic Bastion – our bold new approach to secure the underwater battlespace against a modernising Russia.”

Jenkins referenced the formation of a “revolutionary underwater network” stretching from the Mid-Atlantic Ridge to the Norwegian Sea, based on autonomous systems and new detection technologies. “We’ve already made rapid and significant progress with delivering Atlantic Bastion. A force that keeps us secure at home and strong abroad,” he said.

Industry partners reported their contributions to the programme. Dr Rich Drake of Anduril UK said the company had developed its Seabed Sentry system in partnership with British firms. BAE Systems’ Scott Jamieson highlighted the role of autonomous submarines, including Herne and its Nautomate control system. Helsing’s Amelia Gould pointed to UK-based AI trials supporting underwater surveillance.