Take an 8 car to Bournemouth from Southampton Central.

Requirements:

Armstrong Powerhouse: Class 411/412 Electric Multiple Unit Pack
AP Common Libary
Class 442 Sound Pack Pro: https://www.armstrongpowerhouse.com/sounds/multiple_unit3/class_442_sound_pack_pro

DTG Class 423, Class 421

DTG Class 442: https://store.steampowered.com/app/277773/Train_Simulator_Gatwick_Express_Class_442_Wessex_EMU_AddOn/

ATS: Class 442 SWT Pre C6 livery Skin: https://alanthomsonsim.com/downloads/class-442-south-west-trains/