| 1906 | C3 | Launched |
| 1915 | E26 | Completed |
| 1929 | Phoenix (N96) | Launched |
| 1941 | Talisman (N78) | HMS Talisman destroyes the wreck of the German merchant Yalova that is grounded at Agios Giorgios Island. |
| 1942 | Una (N87) | HMS Una fires torpedoes against a merchant in Lampedusa harbour but torpedoes hit the rocks. |
| 1942 | Porpoise (N14) | HMS Porpoise lays a minefield (46 mines) west of Tobruk, Libya. |
| 1943 | X10 | On 12th September X10 departed Loch Cairnbawn under tow from HMS Sceptre to take part in the attack on the Scharnhorst. At the appointed time the operational crew took over from the passage crew and proceeded to where the Scharnhorst lay at anchor. A fire in the periscope motor prevented the X-craft from pressing home the attack and she had to withdraw and was taken undertow by HMS Stubborn on 28th September. On 3rd October the tow parted and only with great difficulty was the submarine brought back under control. That evening Stubborn received a gale warning and the order to scuttle X10 at the captains discretion. This was duly done and Stubborn returned to Lerwick. |
| 1943 | Usurper (P56) | HMS Usurper left Algiers on 24th September 1943 with instruction to patrol of La Spezia. On 3rd October she was ordered to move to the Gulf of Genoa. No further contact was made and she failed to return to Algiers on the 12th as expected. The German anti-submarine vessel UJ2208 reported attacking a submarine in the Gulf of Genoa on 3rd October and it is believed that this may have been the Usurper. |
| 1943 | Unruffled (P46) | HMS Unruffled attacks the small German minesweeper R 212 with torpedoes off Bastia, Corsica, France nut misses. |
| 1943 | Unshaken (P54) | HMS Unshaken fires three torpedoes against the Italian merchant Nina off Elba Island. None of the torpedoes fired hit the target. |
| 1943 | Unswerving (P63) | Completed |
| 1944 | Unswerving (P63) | HMS Unswerving torpedoes and sinks the German tanker Bertha about 40 nautical miles north of Skiathos Island, Greece. |
| 1944 | Vox (P67) | Whilst serving with the Free French Navy, torpedoed and sank the German guard boat GM 03/Netzleger XII off Skiathos Island, Greece. |
| 1960 | Anchorite (P422) | Anchorite was damaged striking an uncharted rock now known as Anchorite rock in the Gulf of Auraki, New Zealand. |
| 1967 | Resolution (S22) | Completed |
