If no one claims to have has seen it, I'll post a photo!
The locos look a little like a miniature Scotsman, and the carriages were open, green coloured, with bench seats with backs that fold either way (very similar to the Ravenglass & Eskdale - if there are models for that they should do). The locos are actually diesel so do not really need steam effects.
Thanking you all in anticipation
John