| Navy | The Royal Navy |
| Type | Patrol vessel |
| Class | Kingfisher |
| Pennant | L 42 / K 42 |
| Mod | First group |
| Built by | A. Stephen & Sons Ltd. (Glasgow, Scotland) |
| Ordered | 21 Mar 1935 |
| Laid down | 12 Jun 1935 |
| Launched | 26 Mar 1936 |
| Commissioned | 15 Jul 1936 |
| End service | |
| History | Sold 21 April 1947. |
Commands listed for HMS Mallard (L 42 / K 42)
Please note that we're still working on this section
and that we only list Commanding Officers for the duration of the Second World War.
| Commander | From | To | |
| 1 | Lt.Cdr. Dennis Victor Clift, RN | 20 May 1938 | 2 Oct 1939 |
| 2 | Cdr. (retired) Charles Gordon Norrie Graham, RN | 2 Oct 1939 | 12 Mar 1940 |
| 3 | Cdr. (retired) the Hon. Valentine Maurice Wyndham-Quin, RN | 12 Mar 1940 | 18 Oct 1940 |
| 4 | Lt. Hedley Ian Saxton White, RNR | 18 Oct 1940 | 20 May 1941 |
| 5 | Lt.Cdr. Derry Parsons, RD, RNR | 20 May 1941 | 30 Mar 1943 |
| 6 | Lt.Cdr. (emergency) Victor Alexander Christian Henry George de Mauny, RN | 30 Mar 1943 | 1 Jul 1945 |
| 7 | T/Lt. Michael Rayner Thwaites, RNVR | early 1945 | 23 Feb 1945 |
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Notable events involving Mallard include:
30 Sep 1940
HMS Mallard (the Hon. V.M. Wyndham-Quin, RN) is mined near Harwich. She is badly damaged. Repairs last to May 1941.