The loco hauled Chiltern trains have a similar scheme to that plane photo above: Harsh white lights and dull grey seats. Not my cup of tea.
Last night a pantograph failed at Marston Green and the pendolino cruised to a halt at Birmingham International with just the central aisle spot lights working. The concealed strip lights all went out, providing an excellent subdued mood, a bit like a long haul flight at night. This would be nice, with people using the reading lights as required, on a permanent basis in the evenings. Again, same as what aircraft have.
The seats (in 1st) are still OK. However, a lot of the arms rests are failing and the plastic tables are very worn, with chunks missing and them resembling a greasy spoon cafe. The rattling blinds drive me mad and the white clips at the bottom of the runners are mostly broken, which looks very tatty. The areas below the water fridges look rough too, and use up a lot of room where suitcases could go, despite seldom being used for the catering trollies.