LB&SCR B4 class
 The B4 class were 4-4-0 steam locomotives for express passenger work on the London Brighton and South Coast Railway. They were designed by R. J. Billinton and were either built at Brighton works 1899–1902 or else by Messrs Sharp Stewart and Company in 1901. Twelve members of the class were rebuilt from 1922–1924 by L. B. Billinton with a larger boiler cylinders and a superheater. The rebuilt locomotives were classified B4X.