From a distance I could see a roadrail dumper truck at Bristol Barton Hill. It had a red "D" on it but I was unable to read anything else. Any ideas as to what it is please
Barton Hill - Sightings Requests - Forum
That's the Alma Rail dumper. Presumably it's still D1.
They have a D2 also, but that was up at Crewe the other day.