The LB&SCR E4 class is a class of 0-6-2T side tank steam locomotive designed by Robert Billinton. They were introduced in 1897 and were essentially a larger version of the E3 Class. They were powerful for their size and were stalwarts of local passenger, freight and branch work for more than fifty years. 

They were so successful that they were more commonly assigned to passenger trains as opposed to freight work, which is what they were originally intended for. During World War I the Railway Operating Division borrowed several members of the class for work in France. All of them were returned to England in 1919. 

Seventy-five members of the class were built, one has been preserved.