I've literally just seen this: On the Steam page of the Class 444 EMU, it says that this add-on requires the Portsmouth Direct Line to run. Why?? If it's the scenarios that need the PDL, sure I understand that, but why can't you use the train without owning the PDL? I'm not sure if this is a bug, so please, could somebody explain why this could be, in the comments below? Thanks! - 52_Western