You will drive a Southern class 313 to Hove via Preston Park due to a earlier Thameslink service being delayed and not stopping at the station.
Requirements:
South London to Brighton route
Class 377
Gatwick Express class 387 reskin
Class 313 (Armstrong Powerhouse)
How to install:
Go to your Railworks folder
Click on utilities
Go to Package Manage
Click install
choose the replacement service.rwp
load up train simulator
clear cache
That should be it