HMS Formidable
HMS Formidable’s sister ship HMS Irresistible
| Name | HMS Formidable |
| Type | Battleship |
| GRT | 15,000 tons (one of the largest ships hit) |
| Country |  British |
| Built | 1898 |
| Builder | Portsmouth Dockyard |
| Operator | Royal Navy |
| History | She was one of 3 battleships of the Formidable class built from 1898 - 1902. Her sisters were HMS Irresistible (lost at Dardanelles on 18 March 1915) and HMS Implacable (scrapped in 1921). Crew was about 711 men. |
U-boat attacks on Battleship Formidable
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 1 Jan 1915 | U 24 (Rudolf Schneider) | Sunk | Torpedoed 30 miles S of Lyme Regis | 50.13N, 03.04W | 547 |
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