Neither of those, but we now have two guesses which are, or more accurately were*, operated in the same geographical area as the subject of the photo.
*One of them no longer works in the relevant area.
Class 377?
Well done.... you are quite right. At Selhurst, on one of the flyovers. Was it my clue last night that gave it away?
The original picture, one of those fortunate flukes of timing, is below, and yes I will be getting rid of that reflection in Photoshop!
Class 153?
Class 155?
Class 150?
Class 317?
I think it’s been hiding in plain sight this whole time, 67?
66???