I've run into a bug on London Commuter, I was doing a service from Haywards Heath to Victoria when in the middle of nowhere I got "you ran over a red signal" and the game ended. I tried several times, the message occurs exactly at 18:29:50 even when I'm in free roam... So it seems to be a problem with an AI train. I red about red signals staying red being a problem on the line (does not stop me, you can simply delete the blocking train) but not about this problem making it impossible to complete any journey that includes 18:29:50...