Lydian
| Name | Lydian |
| Type | Navy Trawler |
| GRT | 244 tons |
| Country |  British |
| Built | 1908 |
| Builder | J. Duthie Torry SB. Co., Aberdeen |
| Operator | Royal Navy |
| History | Peace-time operator: S. A. Laycock, Milford |
U-boat attacks on Navy Trawler Lydian
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 18 Sep 1915 | UC 6 (Matthias Graf von Schmettow) | Sunk | Mined off South Foreland | 8 |
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