Hello again I have encountered a red light 547 yards from croftfoot 15:47 that will not change I've contacted the signaller and receive the same denied wait for signal to change, been sat in front of this red for about 20 minutes.
Did you used the 'save game' function? The 'save game' function is a bit broken. Maybe that's why there was a constantly red signal.
Then that is the cause of the red signals. Play the scenario again, without saving it. It will then work without any problems.