The deployment follows a decision by British Prime Minister Keir Starmer to allow U.S. forces to use UK bases for strikes against Iranian targets threatening the Strait of Hormuz. Initially limited to defensive actions, the authorization has reportedly been expanded to include operations aimed at protecting maritime shipping.
HMS Anson is equipped with Tomahawk Block IV cruise missiles, with a range of about 1,600 kilometers, as well as Spearfish heavyweight torpedoes. The submarine traveled more than 8,800 kilometers from Australia to reach its current area of operations.
According to military sources cited by the Daily Mail, the submarine surfaces once a day to establish communication with the Permanent Joint Headquarters in Northwood, near London. Following authorization from the prime minister, Chief of Joint Operations Gen. Nick Perry can issue an order to launch missiles.
The submarine is capable of remaining concealed underwater for extended periods, with its precise location known only to a limited number of officials. These reportedly include the prime minister, the commander of maritime operations and the submarine service.
The UK Ministry of Defence declined to comment on operational details or submarine deployments. It stated that Royal Navy capabilities in the region are under continuous review.
HMS Anson is the latest Astute-class nuclear-powered attack submarine, based at Faslane in Scotland. The class represents the most advanced and capable attack submarines operated by the Royal Navy.
Astute-class submarines are equipped with advanced sensors, integrated combat systems and modern weapons designed for a wide range of missions. They can operate globally without surfacing and produce their own oxygen and drinking water.
Unlike earlier submarines, the class does not use traditional optical periscopes, relying instead on high-definition video systems. The vessels are also designed to operate with very low acoustic signatures, enhancing their stealth.
The Tomahawk Block IV missile carried by HMS Anson can strike land targets at long range and can be retargeted during flight. It is also capable of transmitting battlefield imagery back to the submarine.
The Spearfish torpedo, weighing nearly two tonnes, is designed for anti-submarine and anti-surface warfare. It can engage targets at significant distances using advanced guidance systems.
HMS Anson measures approximately 97 meters in length and displaces around 7,800 tons. Powered by a Rolls-Royce nuclear reactor, it does not require refueling during its expected 25-year service life.
Astute-class submarines do not carry nuclear weapons, which are deployed on the UK’s Vanguard-class ballistic missile submarines. The Royal Navy plans to operate a total of seven Astute-class submarines, several of which are already in active service.
