'Get those Empty Hoppers Back - Fast!', BR staff poster, c 1965-1970.
© NRM / Pictorial Collection / Science & Society Picture Library
Staff poster produced for British Rail (BR) Central Wagon Authority, showing an empty freight train travelling at speed towards the machinery of a mine or pit. A 'hopper' is a railway car used to transport materials such as coal or gravel and is capable of discharging its load when neccesary, through its floor.