Alright, I admit it – I haven’t got a clue about trains.
I have no idea what purpose these white wheels served, other than offering up a lovely symmetrical photo opportunity of course. Furthermore, they wouldn’t turn so I could even figure that out.
I like to think they controlled those bumpers in the middle of the image, allowing them to retract or extend as needed…but then I also like to think that one day I’ll open up my wardrobe at home and discover Narnia so I wouldn’t be surprised to find out that their actual purpose is something entirely different.
If anyone reading this knows for sure what they do, let me know (though be warned that you will from hereon be labelled as a train spotter).