The threads about Manchester and the Ordsall Curve sent me to Google Maps to see exactly where it would go. To my surprise, I think I may have located some abandoned industrial diesels nearby. If you search on Duncan Street, Salford, go to Street View and look North, you'll see a big modern green industrial shed, called Duncan Street enterprises. If you look at the eastern end of the shed, between it and the car wash, you should be able to see what looks like an industrial shunter. Fly over the scene and head slightly West, and you'll see another 4 on an abandoned spur off the main line. (I couldn't find a Street view angle on these). Anyone know what they are?
