| 1936 | 1937 - 1978: Maidstone (F44) | Laid down by John Browns at Clydebank |
| 1940 | Rorqual (N74) | HMS Rorqual laid a minefield (50 mines) off Tukrah, Libya. |
| 1940 | Utmost (N19) | Completed |
| 1941 | Tigris (N63) | HMS Tigris torpedoes and sinks the Norwegian passenger/cargo ship Haakon Jarl near Svrholt, Norway. |
| 1942 | Safari (P211) | HMS Safari sinks the Italian sailing vessel Ausonia with gunfire 11 nautical miles bearing 180 from Orosei, Sardinia. |
| 1942 | Turbulent (N98) | HMS Turbulent torpedoes and damages the Italian transport ship Nino Bixio 12 nautical miles south-west of Navarino, Greece. This ship is loaded with some 2000 POW's, over which over 300 perish as a result of this attack. |
| 1942 | Unison (P43) | While on patrol in the Ionian Sea, HMS Unison attacks the Italian merchant Chisone with torpedoes off Zante, Greece. All torpedoes miss. |
