In reply to Paul Phillips - UKC and UKH:
Not sure how good an idea that is, Paul. Looking at the CC Ogwen guide, Sheepbone Crag is effectively one of the 9 buttresses that make up Gallt yr Ogof and it only has 3 routes on it. There are about 70 routes recorded on the whole crag. (I've never climbed there, but have just mentally added it to my "to do" list.)