| 1913 | E5 | Completed |
| 1940 | Usk (N65) | Launched |
| 1944 | Tantivy (P319) | HMS Tantivy lays mines in the Strait of Malacca. |
| 1944 | Taciturn (P334) | Launched |
| 1971 | 1938 - 1978: Forth (F04) | Arrived at Devonport after five years at Singapore with 7th Sub Sqdn |
| 1971 | 1938 - 1978: Forth (F04) | She arrived back in the UK from Singapore |
| Otus (N92) | |
 | |
| Built By: | Vickers (Barrow) |
| Build Group: | O Group 2 |
| Fate: | The last submarine of this type to be taken out of service in April 1946. Scuttled in September 1946 off the coast of Durban. |
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| © I W Hillbeck 2019 |
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