Scratch-built battery electric locomotive, with a "125 Intercity" type body of distinctly grotty appearance. When you're fed up with that one there's an even nastier body representing some other sort of diesel which you can put on instead. Sinclair C5 motor, Parkside electronic controller (which is probably the best bit about it). It will run on 12 or 24 volts apparently, although at the higher voltage the speeds get a bit scary.
Length 48 inches