I reached Gatwick airport late. The train on the left, which should have left when your got there is still there, Their is still a green light and the doors are wide open. My light stays red
WHICH ROUTE? WHICH SCENARIO? Unless we know, we can't help. Are you sure you are talking about a TS2022 scenario not a TSW2 mission?
Well why don't you ask in the TSW2 Forum instead of this one. https://forums.dovetailgames.com/forums/technical-reports.80/ This forum is for a completely different game.