| 1915 | E44 | Laid Down |
| 1932 | Sturgeon (N73) | Launched |
| 1940 | Seal (N37) | HMS Seal departed Portsmouth for Rosyth. She made the passage together with HMS Narwhal |
| 1944 | Sibyl (P217) | HMS Sibyl sinks the Greek sailing vessel Taxiachos with gunfire off Cape Baba, Turkey. |
| 1944 | Unruly (P49) | HMS Unruly sinks a sailing vessel with gunfire off Cape Doro, Andros Island, Greece. |
| 1944 | P52 | Sank the Greek sailing vessel MY 200 / Elleni with gunfire northwest of Lesbos Island, Greece. |
| Thistle (N24) | |
| Built By: | Vickers (Barrow) |
| Build Group: | T Group 1 |
| Fate: | In the early hours of 10th April 1940 Submarine HMS Thistle (Lt Cdr Herbert James Caldwell) was on the surface charging batteries off Skudenses in Norway when she was sighted by the U-Boat U-4 (Hinsh). Two torpedoes were fired at very close range, the first missed but the second hit and Thistle was sunk with all hands. |
Jonathan Gates
The Astute-class is the largest, most advanced and most powerful attack submarine ever operated by the Royal Navy, combining world-leading sensors, design and weaponry in a versatile vessel. The submarines are nuclear-propelled and fuelled by a nuclear reactor powerful enough to supply a city the size of Southampton.
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