Drive a GWR Class 150/2 on an all stops service from Par to Newquay, then on the all stops return service.
Scenario run time: ~110 minutes.

Requirements (Freeware links in readme, * = static AI only):
Steam:
China Clay for Export*
EWS Class 66 V2.0*

Armstrong Powerhouse:
Class 66 Enhancement Pack*
Class 150/2 Pack

High Speed Tracks/ATS:
Atlantic Coast Line

James Ivell/ATS:
Class 66 LED Headlights*