Nah, set it back ten years, have the pacers and sprinters on there along with a GWR 158 and HSTs in Cardiff Central 2021 would remove the pacers and the HSTs bar the short sets and would need an 80x to fill out the gaps
But that would mean arriva and they might not be able to get license for them because they are not a train operator anymore
I picked the number 10 out of my nethers... make it March 2018. ATW had gone bust then and TfW had taken over
It's as much to fill out timetables (pacers made up a lot of northern local traffic) as anything else