British Nuclear Sub Deployed to Arabian Sea Amid Rising Regional Tensions

Saturday, March 21, 2026 at 8:22 PM

A Royal Navy nuclear submarine armed with cruise missiles has reportedly moved into the Arabian Sea, positioning Britain for potential long-range military action. The deployment follows UK authorization for US forces to use British bases for strikes against Iranian targets threatening regional shipping lanes.

A Royal Navy nuclear submarine carrying cruise missiles has been deployed to the Arabian Sea, positioning the United Kingdom for potential long-range military operations as tensions continue to rise in the region, according to a Saturday report from the Daily Mail.

Reuters was unable to independently confirm the deployment. The British Ministry of Defence has not yet responded to requests for comment regarding the report.

According to the Daily Mail, HMS Anson departed from Perth earlier this month and traveled approximately 5,500 miles to reach its current position. The vessel carries Tomahawk Block IV missiles along with Spearfish torpedoes.

The submarine reportedly surfaces at regular intervals to maintain communication with the UK’s Permanent Joint Headquarters located in Northwood. Any authorization to launch missiles would require approval from the prime minister and would be transmitted through the chief of joint operations, the report stated.

This military positioning follows a recent decision by Downing Street to allow the United States to utilize British military installations for potential strikes against Iranian facilities that pose threats to the Strait of Hormuz shipping corridor.

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