I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission not required.
Border Counties Railway viaduct opened 1862 and closed 1969. Only the Down line remains the Up line side of the viaduct was removed soon after closure.
I parked at the church and walked to the viaduct along the river side.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 22/03/2025. It remains the responsibility of any pilot to check for any changes before flying at the same location.