The class 20 and the class 31 seem to be mutually exclusive. If you drive the class 20, you won't see any class 31 on AI traffic. If you drive the class 31, you won't see any class 20 on AI traffic. Assume this is a bug as opposed to design?
Class 20 "Chop and change" scenario, I'm stuck at a red automatic (signaller controlled) set of lights waiting to move the remaining fault free Lime wagons back up to the Wagon repair spur. - - - - - It's really about time that TSW / DTG gave us some sort of manual over-ride for Red light issues, and for managing Signaller controlled points when scenarios bug out. - - - - - - Please sort this out, given that saving often creates more problems than it's worth users end up wasting time messing about on scenarios that haven't been tested properly or just bug out for no apparent reason. I had the same sort of issue with the Class 43 on the Drag Line Scenario on the West Coast DLC. Any ideas anyone?
I drove a timetabled Class 20 loaded steel trains towards Darlington yesterday and passed an AI driven Class 31 with a rake of PCAs around Tee Side Airport coming from that direction, so they do turn up.