Description
The only difference between these diagrams was that D49 was 9’0″ wide whereas D50 was 9’3″. They were intended for longer distance workings, having side corridors and two toilets, the corridors being reversed on opposite sides of the body. All but the last eight were built with turnbuckle underframes; although the LNER changed to conventional girder trusses in 1931/32, there still existed many underframes that had been built for an earlier cancelled order.
