A Question About West Cornwall Local Layers

On West Cornwall Local the Class 37 is given 6 services by default, however if you have the correct trains/routes the number of class 37 services jumps to 21 which includes passenger services and ecs services.
What train/route do you need to get access to the extra class 37 layers. A reply will be appreciated. (I don't have wcl yet so I don't know if I have the right routes for it).

 

Northern trans-pennine

 

Brilliant! I have Northern trans pennine, thank you for the reply matt#4801

 

No problem mate

 

Sorry I forgot to say that you do also need the heavy freight pack for Northern trans-pennine as well.
Sorry not to have made this clear originally.

 

Isn't the 37 on tees valley?

 

Yeah but it is also on west cornwall.

 

I'm assuming the 37 also subs in from the 45 and 47? Completely forgot about that lol

 

37 can do same services assigned to the 47/45