| 1918 | Last torpedo of WWI | The final German torpedo of World War I was fired in the Irish Sea sinking a small British merchant ship the Saint Barcham and drowning its eight crewmen. |
| 1918 | H42 | Launched |
| 1937 | 1937 - 1978: Maidstone (F44) | Launched |
| 1941 | Rorqual (N74) | HMS Rorqual lays 10 mines off Isola dei Cavoli off south-east Sardinia. |
| 1942 | Graph (P715) | While on patrol in the Bay of Biscay, HMS Graph attacks but misses the German submarine U-333 with four torpedoes about 50 nautical miles north-north-east of Cape Ortegal, Spain. |
| 1944 | Spark (P236) | HMS Spark arrives at Trincomalee to join the Eastern Fleet. |
| 1944 | Tantivy (P319) | While operating in Makassar Strait HMS Tantivy sinks with gunfire, eight small Japanese vessels. |
| 1960 | Dreadnought (S101) | Launched |
| 2016 | Dreadnought (S126) | First of class name officially announced of Trafalgar Day, which was also the day the first Dreadnought submarine was launched by HM Queen, the first nuclear powered submarine in the Royal Navy. |
