Southern Sandstone is a local name for the Ardingly Sandstone of southeast England, a soft sandstone of Cretaceous age separating the Tunbridge Wells Sands from the overlying Grinstead Clay. The outcrops in the Weald of Kent are the rock climbing crags closest to London and are probably the most heavily climbed in the UK.[1]
Stone Farm and Harrisons Rocks are managed by the British Mountaineering Council (BMC). The rock is particularly soft and care needs to be taken to prevent erosion. It is climbed either solo or on a top-rope. Many bolts have been placed at the top of the crags. Soloing requires no more equipment than bouldering.[2]