First Great Western HST at Cardiff Central, UK
Mark 3 carriages of a Swansea - London HST at Cardiff Central.
This train is quite a rare sight now, as there are few entire trains left without at least a few carriages in the new Firstgroup blue/pink livery - however this train is still in the green livery in its entirety.
First class is always at the London (Left-of-picture) end of the train. Nearest the camera is the buffet car, followed by 5 standard carriages.

Photo by Timothy Vince (le_random@yahoo.co.uk)