A small shaft above the track. From the 3x1m shaft top rocks fall about 8m and bounce further – sounds to be a reasonable size. As with site 4502, it seems odd it was not previously recorded – may have been put in wrong place?

References: anon., 2017a (January, February logbook)
Entrance pictures : February 2017
Underground pictures :
Video :
Detailed survey :
Line Survey :
On area survey :
Survex file :