| History | |
|---|---|
 United Kingdom | |
| Name | Firefly |
| Builder | Cook, Welton & Gemmell, Beverley |
| Yard number | 552 |
| Launched | 23 August 1930 |
| Completed | 23 September 1930 |
| Acquired | September 1939 |
| Renamed | St Just in 1946 |
| Fate | Scrapped by 1 March 1961 |
| General characteristics | |
| Displacement | 394 tons |
| Length | 44.2 m pp |
| Beam | 7.5 m |
| Notes | Pennant number FY673 |
HMT Firefly was a minesweeping trawler that saw service during the Second World War.
She was built as a trawler by Cook, Welton & Gemmell, of Beverley and launched on 23 August 1930. She was operated by the St Andrew's Steam Fishing Company Ltd, out of Hull.