The update notes are here (not every bugfix is mentioned): https://forums.dovetailgames.com/threads/train-sim-world-2-update-2nd-february-2020.34596/
On the roadmap for GWE it says extension to the GWE as well as based in 70’s with blue livery locos. The blue pack should be 50’s, 47’s or 33/31 or maybe 101’s or 158 etc. Hoping it will be Bristol Temple Meads to Exeter St David’s or Exeter to Paignton.