U.K. nuclear-powered submarine positioned in Arabian Sea amid regional tensions, Daily Mail reports

A British ​nuclear-powered submarine equipped with Tomahawk ‌cruise missiles has taken ​position in the Arabian ⁠Sea, giving Britain the capability to launch long-range strikes if ‌regional conflict escalates, the Daily Mail reported on ‌Saturday (March 21, 2026).

Reuters could not ‌immediately ⁠verify the report. The ⁠British Ministry of Defence did not immediately respond to a Reuters request ​for comment.

HMS ‌Anson, armed with Tomahawk Block IV missiles and Spearfish torpedoes, left Perth earlier ‌this month and ​travelled roughly 5,500 miles to the region, the ⁠Daily Mail said.

The submarine surfaces periodically to communicate ‌with the U.K.’s Permanent Joint Headquarters in Northwood, where any launch order would be authorised by the prime minister and conveyed ‌by the chief of joint operations, ​the report added.

The deployment comes after Downing ⁠Street authorised the U.S. to use ⁠British bases for strikes on Iranian ‌sites threatening the Strait of Hormuz.