Local suburban traffic was dealt with by numerous 2-4-2T and 0-6-0T locomotives belonging to several different classes. Stratford Engine Shed, for instance, had 163 2-4-2T engines of four classes. As trains got heavier, these locomotives were replaced by the Class L77 0-6-2T (LNER N7) designed by Alfred John Hill and introduced in 1915. 134 were built, including a number after the LNER took over in 1923; one is preserved. The 2-4-2Ts, of which none survive, were mostly cascaded out of suburban traffic by the 1940s and worked until the late 1950s on branch lines.