Also would layer onto the SEHS from Strood (Medway Valley Line) to end of line at Northfleet. I believe these are run by 66s in game at the moment
I just realised that no one has talked about br class 20s as it would be great to have them as an addition for livery designer as their are multiple liveries people can do also works with nearly every british route as it was used all over britain.
We are talking here though about GWE and Class 20's were never that common on the Western. 31's back in the day, yes as they appeared on the Old Oak "in and out" ECS workings and also on some secondary services.