I was at Bolton Station a few days ago heading north. A Southport train departs and the platform end signal progressively clears to double yellow about 3mins later a tpx Glasgow train arrives, stops and loads.
The platform end signal is green and the station staff give the train the wave to leave but the guard doesn't take the tip and remains on the platform. The platform staff walk down and speak with them.
It appears that between the platform staff looking and raising his batton the signal has gone back to red.
Much discussing amongst staff and telephone calls and the signal clears again and the train departs.
What would be the likely cause of the signal reverting then clearing.
The platform end signal is green and the station staff give the train the wave to leave but the guard doesn't take the tip and remains on the platform. The platform staff walk down and speak with them.
It appears that between the platform staff looking and raising his batton the signal has gone back to red.
Much discussing amongst staff and telephone calls and the signal clears again and the train departs.
What would be the likely cause of the signal reverting then clearing.