His Majesty King Charles III formally welcomed the Royal Navy’s newest nuclear-powered attack submarine, HMS Agamemnon, into service during a commissioning ceremony at BAE Systems’ yard in Barrow-in-Furness.
The milestone event marked the sixth Astute-class submarine to join the fleet.
The King, departing from naval tradition, personally read the commissioning warrant, declaring the vessel ready for operations. Typically performed by the Fleet Commander, the act underlined the importance of the occasion.
The ceremony, attended by some 500 guests including senior political leaders, military officials, and family members, followed a blessing by the Chaplain of the Fleet, Reverend Doctor Mark Davidson, and remarks from Commander David “Bing” Crosby, Agamemnon’s commanding officer.
Guest of Honour Lady Sarah Jane Sedwill, sponsor of the submarine, praised the workforce and crew, saying the boat would provide “silent security to defend our nation, allies and interests for many decades to come.” She also highlighted the dedication of the sailors and their families, describing them as central to the vessel’s success.
Commander Crosby, now commanding his fourth Astute-class submarine, said the commissioning reflected years of effort across government, industry, and naval personnel. “The national endeavour – industry, sailors and submariners, contractors, civil servants, naval architects, engineers, technicians, computer and systems engineers – behind the boat had created a machine which stands at the forefront of modern submarine warfare in the most unforgiving of all battlespaces,” he said.
Once she sails from Barrow, Agamemnon will be based at HM Naval Base Clyde in Scotland, joining her five sister boats already in service. The submarine will serve as both shield and sword of the Fleet, defending carrier strike groups, the UK’s nuclear deterrent, and critical undersea infrastructure. Armed with advanced sensors, Spearfish torpedoes, and Tomahawk cruise missiles, the vessel has the ability to strike land targets up to 1,000 miles away.
First Sea Lord General Sir Gwyn Jenkins emphasized the boat’s strategic role. “The commissioning of the sixth Astute class submarine, HMS Agamemnon and the steel cut for the fourth Dreadnought-class submarine, HMS King George VI, mark significant milestones in the Royal Navy’s enduring commitment to safeguarding our nation,” he said. He added that the submarine fleet remains “respected by allies, feared by enemies and the pride of our island nation.”
Agamemnon’s introduction comes as the Royal Navy continues to balance its role in maintaining the Continuous at Sea Deterrent and meeting global security demands in an increasingly complex threat environment.
Charles Woodburn, chief executive of BAE Systems, called the project a testament to British industrial and naval cooperation, while Defence Secretary John Healey and other senior leaders also delivered remarks highlighting the submarine’s contribution to national defense.
The Astute-class submarines are among the most advanced in the world, combining stealth technology, endurance, and firepower. HMS Agamemnon represents the latest step in a program that began with HMS Astute’s commissioning in 2010.
For the Royal Navy, Agamemnon strengthens its ability to operate unseen, project power, and maintain a decisive undersea advantage in the face of evolving threats.