HMS Astute (S119): The Lead Boat of a New Generation

Constructed at Barrow

HMS Astute was built by BAE Systems Submarine Solutions at Barrow-in-Furness and launched on 8 June 2007 by the then Duchess of Cornwall, a full 43 months behind schedule, a reflection of just how technically demanding the new Astute-class programme proved to be.

She entered service on 27 August 2010 as the lead boat of her class and, at the time, the largest attack submarine in Royal Navy history, displacing 7,400 tonnes submerged and powered by a Rolls-Royce PWR2 reactor needing no refuelling across a 25-year service life.

The forty-three months of delay are explained in HMS Artful and were largely the price of Britain having stopped building submarines for long enough to forget how. What arrived at the end of it was a considerable step up. Astute is around a third larger than the Trafalgars she replaced, carries thirty-eight weapons rather than a couple of dozen, makes her own oxygen and fresh water indefinitely, and never needs refuelling: the core that went in at Barrow is meant to last her entire life. She is also very much quieter than anything the Royal Navy had operated before, which is the only measurement that really matters.

The name had been carried before her by HMS Astute (P447), an Amphion-class boat of 1945 that spent the Cuban Missile Crisis watching for Soviet submarines and was broken up in 1970. The two make a useful pair for anyone trying to grasp how far submarines travelled in sixty years. The first Astute displaced about 1,400 tons on the surface, ran on diesels and batteries, had to come up or snort to breathe, and carried a crew of sixty-odd. The second displaces 7,400 tonnes dived, never surfaces unless she wants to, makes her own air and water, has fuel for twenty-five years and can put a cruise missile into a building a thousand miles inland. Same name, same navy, same yard town. Almost nothing else in common.

Running Aground Off Skye

On 22 October 2010, just weeks after entering service, Astute ran aground on a silt bank near Kyle of Lochalsh during a personnel transfer exercise in the narrow channel between Skye and the mainland.

A subsequent inquiry found a genuine catalogue of failures: the commanding officer did not act on three separate requests from other officers to reduce speed and alter course, the vessel drifted outside its safety marker buoys, no dedicated plan or briefing existed for the transfer, and the main radar system had not even been deployed.

The submarine remained stuck fast for nearly eleven hours until the rising tide allowed her free, and during the recovery effort the tug Anglian Prince collided with her, damaging a starboard foreplane on top of the rudder damage from the grounding itself.

Commander Andy Coles, her commanding officer, was removed from post within weeks, and the report's ten recommendations included mandatory navigation training ahead of future sea trials, a serious early setback for the new class.

It was an unusually public start for a boat that had cost well over a billion pounds. Put together, the grounding and the collision with the tug that came to help produced a picture of the Royal Navy's newest and most expensive vessel stuck on a sandbank in a Scottish narrows for the best part of half a day, in daylight, being photographed. The findings were about seamanship rather than about the submarine, and none of it reflected on the design, but the timing was miserable: a class already years late and heavily over budget did not need its lead boat aground eight weeks after commissioning.

A Tragedy at Southampton Docks

On 8 April 2011, while Astute was alongside at Southampton Docks, Able Seaman Ryan Donovan opened fire aboard the submarine, fatally shooting Lieutenant Commander Ian Molyneux and wounding three others. Donovan was later given a life sentence with a minimum term of 25 years.

Lieutenant Commander Molyneux, along with two civilians who bravely intervened to help bring the situation under control, were separately awarded the George Medal for gallantry. The courage shown in response stood in stark contrast to the attack itself.

The presence of civilians aboard needs explaining, because it is the part that makes the story hang together. Astute was alongside at Southampton on a courtesy visit, the kind of thing warships do constantly: open to invited guests, showing the flag, letting a city meet the boat named for it or berthed in it. Two local civic officials were being shown round when the shooting started, and rather than getting clear they went at the gunman and held him until he could be disarmed. They had come for a tour and a handshake.

Nothing like it had happened aboard a Royal Navy submarine before, and the two service inquiries into it were published in full, which is not the Ministry of Defence's usual instinct about anything involving a submarine. They found failures in how a sailor with known problems had been handled and in how weapons were controlled aboard, and the procedures changed as a result.

Ongoing Service

Fifteen Years Without a Break

It went ahead. Astute came into Devonport on 30 June 2025 and was handed to Babcock for the first Mid Life Re-Validation Period any boat of her class has had: the reactor, the machinery, the sonar and the combat system all opened up, inspected and brought up to a standard that will carry her through the second half of her life. How long that takes is never published, and on the evidence of the deterrent boats it may be several years.

What she had done to earn it is the part worth recording. She had been in continuous service since August 2010 without a major refit, which is fifteen years, and that is the longest first commission in the history of the Royal Navy's Submarine Service. Along the way she was the first of her class to visit Australia, the first through the Suez Canal and the first to visit the United States. For a submarine whose opening months produced a grounding, a collision and a murder, that is a considerable recovery.

She is not, however, replacing anything any more. The Trafalgars she was designed to relieve have all gone, HMS Triumph last of them in July 2025, and the Astutes are now the whole of Britain's attack submarine force. That is why her going into a dock matters so much more than it once would have: with seven boats to cover everything and one of them opened up at Devonport, there is very little slack. HMS Ambush and HMS Artful carry the story of what that has meant for the rest of the class. Half a century ago the Navy could afford to have HMS Spartan and her five sisters all in commission at once. It cannot now.

This is a live article which will be updated when more information is available.