35m deep shaft. Leads to natural cave. Cris Ebbs describes:

Reid’s Shaft is 35m deep and was blocked at the bottom until excavated in 1987 by GCC. A level runs north-east from shaft bottom then bends to the right following the Gwter Siani vein (bearing 110° in 1987). After about 80m from Reid’s Shaft the level leads to the top of an internal shaft 20m deep. Just beyond the top of this shaft is an area of collapsed ground lying above what could be the continuation of the level.

At the base of the 20m shaft a further level continues, passing a crawl in the right-hand wall leading south to Caves 1 and 2. A further 15m internal shaft leads to a small natural hole at its base which opens onto the top of Cave 3.