 In poor visibility, GNR regulations called for detonators to be laid if possible on the track at the home signal when this was set to danger; at stations where platelayers were available, this should also be done at the distant signals.The express trains were made up of non-bogie non-corridor four- or six-wheel carriages.There were 13 on the Leeds express, giving a weight (including the engine and tender) of somewhat over 200 tons.