The route Nexus on Dinas Mot appears to have a large loose block on pitch 3 (as given on UKC logbooks - https://www.ukclimbing.com/logbook/c.php?i=3301), at the end of the ledge traverse, there's a large detached block with a well used chalked up handhold. Climbers doing the route recently (2017) are concerned that it may be in danger of falling if it continues to be used.  It's also positioned directly above the belay for pitch 2, which is equipped as an abseil point, the top part of pitch 2, and the starting point for several routes on the buttress.

A wide range of cliffs - mainly traditional and multi pitch inc. the popular Llanberis Pass, Idwal Slabs, Clogwyn du'r Arddu and Cwm Silyn cliffs, but also outlying outcrops such as Carreg Alltrem. Many crags are on CROW access land - but not all especially some of the outcrops which lie on private enclosed land. Most of central Snowdonia is both designated an SSSI and also is an European Special Area of Conservation on account of the upland habitat and associated geology and plants found here.