 Swordfish was ordered from Scotts Shipbuilding and Engineering Company on 18 August 1913 although she was not laid down until 28 February 1914 . The start of the First World War six months later greatly hindered her completion , and she was not launched until 18 March 1916 . HMS Swordfish was commissioned on 28 April 1916 , before completion , and renamed HMS S1 that same day . She was not completed until 21 July . 
