| 1939 | Seahorse (S98) | HMS Seahorse was undocked at Rosyth and returned to Dundee. |
| 1940 | Trident (N52) | U-31 was attacked by the British submarine Trident. First the submarine fired 4 torpedoes, all of which missed U-31. When the British sub began to fire its gun, U-31 crash-dived. The Trident followed up with some explosive charges, but without sucess |
| 1940 | Triton (N15) | HMS Triton attacks the Italian merchant Spezia with torpedoes off Vado Ligure, Savona, Italy. All torpedoes missed. |
| 1941 | Rorqual (N74) | HMS Rorqual lays 50 mines in the Gulf of Athens. |
| 1942 | Turbulent (N98) | HMS Turbulent sinks the German Kreta with gunfire near Ras al Hilal, Libya. |
| 1942 | Unbending (P37) | HMS Unbending sinks the Italian Lupa II with gunfire north-east of Djerba, Tunisia. |
| 1942 | P47 | Completed |
| 1943 | Unruly (P49) | HMS Unruly torpedoes and sinks the German minelayer Bulgaria but misses the minelayer Drache south off Amorgos Island, Greece. |
| 1944 | Sturdy (P248) | HMS Sturdy sinks a coaster with gunfire in the Gulf of Boni, Celebes, Netherlands East Indies. |
| 1944 | Vivid (P77) | HMS Vivid torpedoes and sinks the German merchant Achilles and the German tugs Horst and Paul with gunfire north-west of Chios Island, Greece. |
| 1944 | Sleuth (P261) | Completed |
| 1944 | Taciturn (P334) | Completed |
| 2002 | Trafalgar (S107) | HMS Trafalgar hit rocks beneath 150 ft. of water about three miles off the Isle of Skye. The smash caused extensive damage, forcing the vessel to limp back into Faslane naval base. Two crew members were hurt in the impact, one breaking his nose and the other spraining his back. |
| 2014 | Artful (S121) | Completed successful frist dive in Devonshire Dock at Barrow
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