High Quality Content by WIKIPEDIA articles! HMS L2 was a British L-class submarine built by Vickers, Barrow. Originally laid down as E-class submarine E58 on 18 May 1916, she and sister ship E57 incorporated enough changes that they were renamed as the first pair of boats of a newly designated L class. L2 was launched 6 July 1917, and commissioned on 18 December 1917.