| Navy | The Royal Navy |
| Type | Motor Torpedo Boat |
| Class | Higgins 78' |
| Pennant | MTB 420 |
| Built by | Higgins Industies (New Orleans, Louisiana, U.S.A.) |
| Ordered | |
| Laid down | 2 Jun 1942 |
| Launched | 28 Oct 1942 |
| Commissioned | Apr 1943 |
| End service | |
| History | Former USS PT 90. Was to be transferred to the Soviet Union as RPT 6 but convoys to Northern Russia was cancelled so transferred to Great Britain instead. Returned to the USN on 23 October 1945. |
| Former name | USS PT 90 |
Commands listed for HMS MTB 420 (MTB 420)
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. Anthony Constantine Barrington Blomfield, DSC, RN | 8 Jan 1944 | 19 Nov 1944 |
| 2 | T/Lt. Norman Leonard Ilett, RNVR | Jan 1945 | 1 Jan 1945 |
| 3 | T/Lt. Albert Hazen Moore, RNVR | Jan 1945 | mid 1945 |
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