This line I believe would be the perfect addition to the TSW 4 game. Preferred route era - Modern Route Length - 75miles Rolling stock - Classes 165, 166 158, 220/221, 800/802
No GWR license so modern day is out of the question. No reason why it shouldn't be in the BR era though.
Anything pre 1994 would be great or even better early 70’s when the diesel hydraulics ran alongside 45’s, 46’s and 47’s.