HMS L1 was the lead boat of the L-class submarines built for the Royal Navy during World War I.
HMS L1 submarine
British L-class submarine
The British L-class submarine was originally planned under the emergency war programme as an improved version of the British E-class submarine. The scale of change allowed the L class to become a separate class.
L52, L22, L20 & L6, at Gosport in 1933
HMS L15, c. 1918
HMS L52 underway