I find it sad that when you make your own livery of the 465 it can only be used on 4 car services in Timetable on Southeastern High Speed. Somehow, I have sometimes noticed an 8 car Al 465 train, including one of two of the liveries I made. I know, 8 car new livery trains can be driven on Scenario Planner, but I find it sad that you can only drive your new livery on 4 car services in Timetable.
I always thought, that the livery consist worked around the same percentage as the trainbow livery, which is around 4% Though as I've said, it worked for me on the 395, after 100s of attempts. Below is the 395 screenshot I took