 They consisted of a carriage with a miniature locomotive at one end, partly contained within the body of the coach.Passenger services never ran south to Ruabon, as indicated by the 1919-1924 map, which shows a mineral line running south from Ponkey (Ponciau) Crossing.The 1906 timetable shows the line working as the "Wrexham and Ponkey Crossing" branch, served by rail motors on weekdays only and accommodating only a single class.