| Navy | The Royal Navy |
| Type | Submarine |
| Class | A |
| Pennant | P 421 |
| Built by | Cammell Laird Shipyard (Birkenhead, U.K.) |
| Ordered | 7 Apr 1943 |
| Laid down | 16 Jan 1944 |
| Launched | 12 Apr 1945 |
| Commissioned | 2 May 1946 |
| Lost | 16 Apr 1951 |
| History | Lost in a diving accident on 16 April 1951. She was found in June 1951 67 miles south west of St Catherines Light. |
Commands listed for HMS Affray (P 421)
Please note that we're still working on this section.
| Commander | From | To | |
| 1 | A/Lt.Cdr. Ernest John Donaldson Turner, DSO, DSC, RN | 2 Apr 1945 | 12 Mar 1946 |
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