I have tried service 2L24 on the East Coastway a few times and cannot leave Brighton Station due to a red signal. It appears that an ai train has not pulled far enough into the station and is blocking the points I need to use. I have left it at least 5 minutes and nothing has happened.... Edit - after maybe 10 mins the ai train does depart, eventually giving me a green signal but running about 10 mins late before I start
I've come across this a couple of times on different services on ECW. One workaround is to spawn on foot a few minutes before your train is due to depart and jump in the cab of the train that is fouling the points, then drive it up to the buffers. This means that you can then set up your train and start the service on time.