A belated correction to the post about the Pinwherry incident:
From: GUEST,henryp - PM
Date: 02 Oct 12 - 12:42 PM

I haven't read the book from which Dave Goulder got the story, but as he tells it in the song what happened was not a snatch that broke a coupling but that the crew stopped at the bottom of one bank (near Girvan, some way north of Pinwherry) and deliberately divided the train because their loco was too small to take the whole train up the bank. They took the first half up the bank and left it at Pinmore, which is just past the summit at the top of a gradient down to Pinwherry, and went back for the second half. They must have forgotten to pin down enough (or any?) brakes on the waggons at Pinmore, which then ran away past Pinwherry and partway up the next bank towards Barrhill, then back and forth. A recording can be heard here.

As for the song that this thread is mainly about; I absorbed most of it in my childhood but did not understand the line "The engineer said ya did like ----". I heard "ya did like" as a single word of unknown meaning. Many years later the song happened to come into my head and I realised what the full wording would have been.