Yes, I've seen photos of her there, Tim.
There is a series of handbooks on various locomotives, the name of them eludes me, but the cover of the one about the Bumblebee C16 #268 has the 'yellow' appearing amost orange in hue. This may be due to a number of factors, such as the photographic film type, lighting, colour reproduction, etc. But other colour photos (including 16mm film video clip) show it to be yellow, with some weathering I presume, which might have just a tinge/tint of reddish/orange. I cant remember if yellow has an ochre base, which could appear with weathering.
Any ideas, please?
PS In MSTS, with the right routes installed and locomotive and stock you can drive the loco yourself, rather than just turn the controller button.
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Cheers Bazza