 Encouraged by the performance of the vehicles, the District Railway purchased two of their own in 1909, which were larger as they were built to subsurface-gauge.The manufacturer was W. R. Renshaw and Co Ltd, who were based in Stoke-on-Trent in Staffordshire, and the vehicles were fitted with current collector shoes, so that they could draw power from the rails when it was available.During the First World War, they were used as shunting engines at Ealing Common Depot, where power was always available, and so the batteries were removed, and subsequently neglected.