Lonhelen
| Name | Lonhelen |
| Type | Steamer |
| GRT | 1,281 tons |
| Country |  British |
| Built | 1911 |
| Builder | Ropner & Sons, Ltd., Stockton |
| Operator | Port of London Authority, London |
| History | A mud hopper temporarily fitted for cargo service. |
U-boat attacks on Steamer Lonhelen
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 12 Apr 1918 | UC 4 (Ernst Berlin) | Sunk | Mined SW of the Shipwash LV | Newcastle - London | 0 |
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