|Builder:||Vickers Limited, Barrow-in-Furness|
|Laid down:||18 May 1916|
|Launched:||10 May 1917|
|Commissioned:||10 November 1917|
|Fate:||Sold for scrapping, March 1930|
|Class and type:||L class submarine|
|Displacement:||890 long tons (904 t) surfaced
1,074 long tons (1,091 t) submerged
|Length:||222 ft (68 m)|
|Beam:||23 ft 6 in (7.16 m)|
|Speed:||17.3 knots (32.0 km/h; 19.9 mph) surfaced
10.5 knots (19.4 km/h; 12.1 mph) submerged
|Range:||2,800 nmi (5,200 km) at 10 kn (19 km/h; 12 mph) surfaced|
|Armament:||• 6 × 18 in (457 mm) torpedo tubes (4 bow, 2 beam)
• 10 × 18 inch torpedoes
• 1 × 4-inch gun
HMS L1 was a British L-class submarine built by Vickers, Barrow. Originally laid down as E-class submarine E57 on 18 May 1916, she and sister ship E58 incorporated enough changes that they were renamed as the first pair of boats of a newly designated L class. L1 was launched 10 May 1917, and commissioned on 10 November 1917.
She sailed to Hong Kong in 1919. L1 was placed in the reserve flotilla in 1923 in Hong Kong. She was then sold to John Cashmore Ltd in March 1930 for scrapping. While being towed to Newport she broke free and was stranded at Penanwell Cove, near Porth Nanven in Cornwall. She was scrapped where she lay. Some metal remains can still be seen there on low spring tides.
- "L Class Submarines". battleships-cruisers.co.uk. Retrieved 12 May 2010.
- Colledge, J. J.; Warlow, Ben (2006) . Ships of the Royal Navy: The Complete Record of all Fighting Ships of the Royal Navy (Rev. ed.). London: Chatham Publishing. ISBN 978-1-86176-281-8. OCLC 67375475.
- Gardiner, Robert, ed. (1985). Conway's All the World's Fighting Ships, 1906–1921. Annapolis, Maryland: Naval Institute Press. p. 93. ISBN 978-0-87021-907-8. OCLC 12119866.
- Hutchinson, Robert (2001). Jane's Submarines: War Beneath the Waves from 1776 to the Present Day. London: HarperCollins. ISBN 978-0-00-710558-8. OCLC 53783010.
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