Thanks for that WRJ, I have just been searching old maps of the area but there seems to be little in the mid 1800s in the area of the industrial estate, however Marchwiel did have (possibly still does) a pub called Red Lion, equally intriguing. Maybe St Marcellus PR is the next place to look, I don't suppose you know which parish would cover the area of the now industrial estate?
Hope you had a good holiday and best wishes for the season,
Linda