Stop at Reading. I tried this scenario twice and got to this. Looks like the "unload passenger" doesn't work. As you see the timetable is blank, so you don't see if you have to wait for time and get next command which is Reading Depot. Tell me what's wrong.
Scenario has a bug. Have a look here: https://forums.dovetailgames.com/threads/diesel-legends-all-change-scenario.36981/
Ran into the same issue arrive at Reading and the unloading of Passengers fails. Not able to complete this scenario.