The London Underground E Stock were steel-bodied cars built for the London Underground in 1914 by the Gloucester Railway Carriage and Wagon Company. Thirty cars were built, twenty-six driving motor cars and four trailers. The E stock was based on the earlier C Stock and D Stock but differed in that the roof was elliptical rather than the clerestory roof of the C Stock and D Stock. They were generally similar in appearance to the B Stock, except that the E Stock had an elliptical roof.