The railway used electric units with passenger accommodation and an electric motor in the same unit. Any number could be coupled together with all motors controlled by the driver. Built between 1892 and 1899 by Brown Marshall & Co, the original units had one motor, but by the third batch this had been replaced by a motor. In 1902 the motor cars were fitted with two motors, and these were replaced in 1919 by motors. Air brakes were fitted, the pressure topped up at the termini. In the early days a single motor coach ran off-peak, but the norm became a three-coach train consisting of two motor coaches with a trailer coach between. Two classes of accommodation were provided, originally first and second, becoming first and third in 1905 when the L&YR began running over the railway. The cars were open with transverse seating: the central trailer had leather-covered seats for first class passengers; third class passengers had wooden seating. As the voltage was 500 V, when they ran on the L&YR 630 V system the motors had to be in series mode.