The nearest station to Trawden is in Colne. The final verse suggests that the villagers walked to Colne to board the train.

Colne station station opened on 2 October 1848, as the terminus of the Leeds and Bradford Extension Railway from Bradford and Skipton. From April 1849 it was part of a through route between Leeds and Liverpool.
https://en.wikipedia.org/wiki/Colne_railway_station