It left Derby Friargate with four horseboxes from GNR and the MS&LR plus three passenger carriages.
Although the driver was using care in approaching stations, he was being piloted by the fireman who knew the line, but not that the passing loop at Chartley had just been brought into use.
The train approached Chartley at 30 to 35 miles an hour and the leading coach became derailed.
The Inspecting Officer for the Board of Trade recommended that, in future, the facing points for all passing loops should be straight, with the "S" curve at the trailing end.
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