Regretfully I no longer have my Hornby Dublo. I got one of the very first 2 rail train sets. I saved up for it out of my pocket money with a local model shop's Christmas club, and my Dad bought me the A3 controller to go with it.
The set was a Southern Region 0-6-0 tank, a circle of track, 2 wagons and a guard's van.
I expanded this to quite a large layout, adding "Barnstable", and a Co-Bo diesel electric. Loads more rolling stock, notably a red breakdown crane. I sold the lot when I went to University, something I still regret to this day now I'm about to draw my old age pension.