motor car carried two electric traction motors. The passenger cars had bucket seats and manually operated sliding doors. The luggage compartments had double sliding doors. The motor parcel vans, which had four motors, were permitted to haul a load of up to 100 tons. Built by Metropolitan-Cammell, the trains ran on a 600 V DC third rail system. The traction motors were Crompton Parkinson with a , 210 Amp continuous rating and a , 295 Amp 1-hour rating, with a gear ratio of 71:18. The articulated sets were fitted with two motors, the motor luggage vans and motor parcel vans had 4 motors. Electro-pneumatic brakes were fitted; the trains had a pneumatic sanding system. The LNER numbered the articulated units sequentially with the motor cars having odd numbers and the trailers having even numbers. Shortly after nationalisation, British Railways (BR) prefixed these numbers with the letter E (denoting ex-LNER) to distinguish them from similarly numbered coaches inherited from other railways. In 1951, BR re-numbered the motor cars and trailers in separate series, where the third digit indicated the type of car: 1 – motor; 2 – non-driving trailer; 3– driving trailer; 4 – motor parcels van. In each two-car unit, the last two digits of the coach number were the same, i.e. 29101 ran with 29301. From 1954, the origin of the vehicle was indicated by a suffix letter, and the prefix now indicated the region of allocation, where E denoted the Eastern and North Eastern Regions. References Sources LNER Articulated passenger trains London and North Eastern Railway Metropolitan Cammell multiple units Train-related introductions in 1937 600 V DC multiple units