They have been like that since day 1. It has always been impossible to make the floors of the 458s look clean.
I have used them before but only on the Windsor lines I suspect and if something has been in service for a while as it's dirty, I wouldn't think twice.It got better with the transfer from SWT to SWR, but recently standards have been slipping.
However, as these were part of the project to run on the line to Haslemere, I was expecting the floor to be cleaner than it was tonight.
Still, I would rather have that and the 0:49 fast from Clapham Junction to Guildford than have a 450 and no 0:49 service.