For those who have not already seen, a new TSW loco add on is coming. From what I've seen this seems to be the Br class 20 possibly on Tees Valley and/or NTP.
It is class 20 on teeside route, anyone know if I could use it on the east Coastway Railtour service like with the 47 and 40? Not gonna buy the teeside route as well as the 20 I have my mot and full service this month
The chances are this will be available for the rail tour on East Coastway I'll reply back to you on the release on the 18th of June when it comes out.
You would have to buy the Tees route to be able to use the Class 20, even on other routes. Every loco release is tied to a particular route even if it is also useable on other routes once you have it.