BR #37186 (model), York Model Railway Show, York, North Yorkshire, England(UK), 2003

This is, in actual fact, only a model. It's one of the most accurate model locomotives I've ever seen, and the only notable flaw I can see with it is that the "soot" around the chimney (smokestack) just looks like a finger smudge or spilled model cement. I think it was in O Scale, but I'm not sure since I don't remember, and in any case the model is far too good to identify as one scale or another based solely on a photograph.