Accurascale ACC3161-DCC Class 37/4 Diesel 37414 Railfreight Construction DCC SoundAccurascale ACC3161 DCC Class 37 4 Diesel 37414 Railfreight Construction DCC Sound The introduction of Class 156 Super Sprinters on the West Highland from January 1989 and on the Far North Kyle lines in the May triggered an exodus of Class 37 4s to freight work. By the end of that year, Laira, Motherwell and Tinsley had gained allocations, while Immingham and Thornaby both acquired three locos each in the middle of 1990, by which point half the sub