High Quality Content by WIKIPEDIA articles! HMS E26 was a British E class submarine built by William Beardmore and Company, Dalmuir. She was, along with the future E25, one of a pair of submarines ordered by the Ottoman Navy on 29 April 1914, but was taken over by the Royal Navy and assigned the E26 name. She was laid down in November 1914, launched on 11 November 1915, and was commissioned on 3 October 1915.