LONDON — For the first time since the end of the Second World War, Britain risks losing its strategic dominance in the North Atlantic, the head of the Royal Navy has warned. Adm. Gwyn Jenkins, the First Sea Lord, said that Russia’s rapidly expanding undersea capabilities pose a direct challenge to Britain’s ability to secure vital maritime routes, sensitive seabed infrastructure and NATO strategic interests.
His remarks, delivered at the International Sea Power Conference, underscored a growing concern within the U.K. defense establishment: that Britain’s naval forces — long regarded as the backbone of transatlantic security — are now struggling under budget constraints, fleet shortages and intensifying Russian activity.
A Surge in Russian Undersea Operations
According to Jenkins, Russian incursions into the North Atlantic have increased by roughly 30 percent over the past two years. Among the most visible incidents was the appearance of the Russian spy ship Yantar off Scotland’s coast — an intelligence-gathering vessel known for mapping undersea cables and pipelines. Royal Air Force pilots reported that lasers were directed at them from the ship, an episode the British defence secretary, John Healey, described as “dangerous and deeply concerning.”
“What worries me most is what is happening beneath the waves,” Jenkins said. British military intelligence believes Moscow is upgrading its submarine fleet with the aim of targeting critical seabed infrastructure, including data cables and energy pipelines, which are essential to Europe’s economic and security architecture.
Despite the financial burden of the war in Ukraine, Russia continues to invest billions in submarine modernization. “We are under pressure,” Jenkins cautioned. “We must fight to maintain our advantage.”
Britain’s Naval Strain and the Atlantic Bastion Response
Sky News reported that Jenkins recently attended a tense meeting with senior defense officials concerned that government promises to expand the armed forces are not matched by real increases in defense spending. The Royal Navy is grappling with aging vessels, recruitment challenges and a mismatch between strategic ambitions and available resources.
To confront emerging threats, the U.K. has announced the Atlantic Bastion program — an initiative to build a hybrid fleet combining conventional ships with advanced underwater drones designed to hunt enemy submarines. Twenty-six British and European companies have submitted proposals to develop new anti-submarine sensor technologies.
Yet defense analysts warn the program may arrive too late. Peter Roberts, a professor at the Royal United Services Institute, argued that Britain has “neglected” its postwar responsibility to secure the Western Atlantic. “Russia remains unchallenged in significant parts of British waters, and this strategy is an attempt to catch up long after the gap emerged,” he said.
A Strategic Crossroads for the U.K.
The First Sea Lord’s unusually stark warning signals a broader debate about Britain’s geopolitical posture at a time of mounting global instability. As Russia deepens its undersea footprint and NATO seeks to reinforce northern defenses, the question now confronting London is whether it can rebuild capabilities fast enough to retain leadership in a region central to its national identity and its role within the alliance.