The LB&SCR E1 Class were 0-6-0T steam locomotives designed by William Stroudley in 1874 for short-distance goods and piloting duties. They were originally classified E, and generally known as "E-tanks"; They were reclassified E1 in the time of D. E. Marsh. 

The first six locomotives of this useful and long-lived class were built at Brighton and appeared in traffic between September 1874 and March 1875. They performed well and further orders were placed at regular intervals until December 1891 when the class consisted of eighty locomotives and were used throughout the LBSCR system, principally for goods and shunting, but occasionally for secondary passenger duties.

In 1884 Stroudley also built one example with a larger boiler and Gladstone-type cylinders with valves underneath to work on the steeply-graded lines between Eastbourne and Tunbridge Wells. This Special E-tank was withdrawn in 1922.

One has been preserved.