PS5 Simple Workaround To Complete Isambard Comes North Scenario Ecml Diesel Railtour Pack

The Isambard Comes North Scenario using 47484 is bugged towards the end by automatic points that are incorrectly set. This stops you from joining the track behind the train after reversing against signals. It's never been fixed despite submitting tickets.
I finally completed it tonight by simply turning on Disable Junction Derail in the HUD & Gameplay settings.
Hope this helps anyone, wish I'd thought of that a year ago!

 

I could never complete it on TSW5 for the reason you stated.

Whenever I chose quick play the game would choose that scenario 9/10.

When the game chose it for TSW6 it worked first time.

This was on PS5