This four wheeled coach is a representation of the many which served on  the Great Northern Railway (GNR) in the late 19th and early 20th  century.  Four wheeled coaches proved especially good at branch line work where  their small size enabled the traversing of tight radius curves, whilst  lower passenger numbers meant their small size was more acceptable and  enabled trains to be hauled by smaller engines.  This GNR coach is modelled as having step boards to enable access at  stations with low platforms and gas lighting.