were broken-up after commencement and L34 and L35 were cancelled. L13 was never ordered, presumably for 'superstitious' reasons (memories of the K13?) Eighteen of the class were built at Vickers, three of which were completed in other yards.
L Class submarines can be divided into three groups: L1 to L8 with 18-inch bow and beam tubes; L14, L17 and L24 to L27, which were fitted as minelayers, with 21-inch bow tubes; and L9 to L33 (excluding the minelayers) which had 21-inch bow tubes and 18-inch beam tubes.
In addition to torpedo armament, the class carried a gun mounted on the superstructure forward of the bridge. Although the earlier boats (L1 to L8) carried a 3-inch HA gun, all the class were eventually fitted with a 4-inch gun of various
