British Nuclear-Powered Submarine Arrives In Arabian Sea as West Asia Conflict Worsens

A United Kingdom nuclear-powered submarine has reached the Arabian Sea, even as the West Asian war escalated over the last three weeks and is now threatening the world’s energy security.

The Royal Navy’s HMS Anson is capable of launching cruise missiles, possibly against Iran. The vessel is fitted with Tomahawk Block IV land-attack missiles and Spearfish heavyweight torpedoes.

HMS Anson is said to be lurking in the deep waters of the northern Arabian Sea, keeping its location a secret, according to a British media report on Saturday (March 21, 2026).

The development comes even as reports emerged that Iran had fired two intermediate-range ballistic missiles on the UK-administered Diego Garcia, an island in the middle of the Indian Ocean with a military base, also operated by the United States.

The Iranian missiles, reportedly, failed to reach their intended target, as one was intercepted by a US warship using its air defence weapon system, and the other fizzled out.

Iran has denied firing those missiles, which were read as a secret capability of Tehran to fire missiles with a range of up to 4,000 km, while its previously known capability was only 2,000 km range.

The deployment of the nuclear-powered submarine would mean the UK was readying itself to join the US-Israel war on Iran, and getting its capability to fire missiles on Tehran if the conflict escalates to European nations.

At present, the war is confined to West Asia, where Iran has been targeting US allies in the region in retaliation for the US-Israel airstrikes.

The West Asian war this time around began on February 28 when the US-Israel combined airstrikes on Iran killed the Iranian Supreme Leader Ayatollah Ali Khamenei in his office compound in Tehran.

Another media report, this time by a Chinese news agency, claimed that when UK Prime Minister Keir Starmer orders, the submarine would fire missiles at Iran

Only on Friday (March 20, 2026), the United Kingdom had agreed to allow the US to use British military bases to carry out “operations to degrade the missile sites and capabilities being used to attack ships in the Strait of Hormuz,” a Downing Street statement had said.

It said the UK was working with its global partners to develop “a viable plan to safeguard international shipping in the Strait of Hormuz.” It emphasised that the UK was committed to “not getting drawn into the wider conflict,” despite its move to allow the US to use its military bases, which included Diego Garcia.

In response, Iranian Foreign Minister Abbas Araghchi warned against any aid to the American and Israeli aggression against Iran, cautioning that this would further fuel the war and the ramp-up of the escalation ladder.

“The vast majority of the British People do not want any part in the Israel-US war of choice on Iran,” Araghchi posted on X later. “Ignoring his own people, Starmer is putting British lives in danger by allowing UK bases to be used for aggression against Iran. Iran will exercise its right to self-defence,” he said.

Pushing back in the X conversation, the British government cautioned Iran against targeting “UK bases, territory or interests,” underscoring the risk of further escalation.