have just watched the video again. It was in his own words whoever installed the phone line that told him to get the signaler to say where he was phoning from.
trying to figure out the location of the picture. I think it is at Nicolton Bridge (1mile east of Polmont) with the base fro what is now EPB518 in the UP cess
Or with the PICOP or ES standing outside the cab on the track. Another way we have been getting around it is getting the signaler to give the driver the PICOPs phone number and for the driver and PICOP to communicate by phone even when beside each other.
the signal on the loop in the Pans (EA568) has a feather and subsidiary signal. I think the feather is a left over from the access to Blindswell with the subsidiary for access to Cockenzine as the mainline signal (EA572) also has a feather
1.pdf
Their are warning signs on the approach to the junction in both directions.
https://goo.gl/maps/7vLjZh5XefgfWmg16
https://goo.gl/maps/EE9XzWeVhs3hFVYh9