The signaller is able to contact the driver using the GSM-R.
Class 117 dmus are correct for the era and area as they ran to Swanage on excursions. There is a picture of a class 117/101 formation at Swanage...
Permissive working involving running lines has to be approved by the ORR, be authorised in the Special Box Instructions, specifically the for that...
The time out varies between 30 seconds and 4 minutes depending on the location and route being cancelled.
Yes, red blinds are still permitted on the Southern.
Separate names with a comma.