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The Express Gazette
Friday, September 25, 2026

Britain's Newest Nuclear Submarine Launches After 13 Years of Construction

The HMS Agamemnon, a 7,400-tonne hunter-killer submarine, has departed its shipyard for sea trials.

World • 2 hours ago
Britain's Newest Nuclear Submarine Launches After 13 Years of Construction

Britain's newest nuclear-powered attack submarine, the HMS Agamemnon, has launched from its shipyard after a 13-year construction period. The 7,400-tonne, 97-meter vessel is the sixth in the Royal Navy's Astute Class fleet and represents a significant investment of £1.65 billion.

The submarine was commissioned in 2013, with an initial expectation of joining the active fleet by 2022. The HMS Agamemnon departed the BAE Systems shipyard in Barrow-in-Furness for sea trials, a crucial step before its formal entry into active service. Its initial journey involved navigating the shipyard's dock system before entering the Irish Sea.

Once commissioned, the HMS Agamemnon will join five other Astute Class submarines: HMS Astute, HMS Ambush, HMS Artful, HMS Audacious, and HMS Anson. The Ministry of Defence stated that the submarine "embodies the best of British engineering and the professionalism of our submariners and will be one of the most advanced submarines ever operated by the Royal Navy."

During its sea trials, the submarine will undergo rigorous testing to prepare it for service. Officials noted that the vessel is expected to bolster security for the United Kingdom and the Euro-Atlantic region. The submarine was officially named at the BAE Systems Submarines site in Barrow-in-Furness, with a bottle of beer from the local Ulverston Brewing Company smashed against its hull in a christening ceremony.

The launch of the HMS Agamemnon occurs amid concerns about the operational readiness of the Royal Navy's submarine fleet. Reports earlier this year indicated that all five of the UK's currently available Astute Class submarines were undergoing maintenance and repairs, potentially leaving Britain vulnerable.

Military experts have warned that a shortage of available nuclear-powered attack submarines could leave critical infrastructure, such as undersea internet and power cables, vulnerable to sabotage. These submarines also play a vital role in protecting the Vanguard Class submarines that carry the UK's nuclear deterrent.

These developments follow recent reports of technical issues with other naval assets, including one of the UK's aircraft carriers. The head of the UK's military, General Sir Richard Knighton, recently stated that Britain faces threats greater than at any time since the Cold War, with Russia actively probing and challenging Western defenses.

Former First Sea Lord and Labour security minister, Lord West, described the situation of the Astute submarines being out of action as "unacceptable" and "very worrying." He emphasized the critical role these attack submarines play in protecting the UK's strategic assets and deterring potential adversaries. Lord West attributed the current situation to insufficient investment in dry docks, maintenance facilities, personnel, and spare parts.


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