Steam Class 20 And Class 37 Not Appearing In Timetable Menu

Hi Can anyone assist in sorting out an issue with the Class 37 and Class 20 not appearing in the timetable menus. Both locomotives appear in game and can be spawned. In the Tees Valley line timetable the Class 37 does not appear.
I had the Fawx 1989 timetable mod installed which changed the base timetable name to original release timetable. I thought that this may have caused the issue so deleted the Fawx timetable and redownload the route.
Now in Tees Valley timetable there is no selectable Class 37 or Class 20 only Class 101 and Class 31 (and strangely enough the Class 142 and Class 150 both from deleted Fawx 1989 timetable).
Any ideas on what it going on here please?

 

Have you any other mods for Tees valley route? I seem to remember another mod causing problems with the fawx timetable.

 

Thanks for you reply. The problem is that the class 37 and class 20 do not appear in the normal route timetable. I deleted the Fawx timetable and reinstalled the route. Both the locomotives still not appearing. But two items from the Fawx timetable (class 142 and 150)
appear in the fresh route install normal timetable. I did have the route scenery enhancement install and its the same with the mod removed.
I have checked other routes that have the class 37 from Tees Valley and the Class 20 as layers and both are not there in the timetable.
They are there in the game and you can spawn them.

 

I would remove all mods from the dlc folder to see if the problem still persists, if not then replace the mods a few at a time to try and find the problem.