In reply to KingRobbo:
Regarding Tryfan and the Bristly Ridge - I used to live in Snowdonia years ago, and enjoyed many an evening scramble on Tryfan, a wonderful playground. The North Ridge shouIdn't give you any problems, as long as you don't go seriously off route.
I do remember someone dislodging a barrowload of stones from the top of a chimney when climbing the Bristly Ridge back in the 1980's, but other than that, I can't remember it being difficult - hopefully all of the loose rock has been dislodged over the intervening decades!
The Y Gribin Ridge on Glyder Fawr is a worthwhile easy scramble, as is the Halls Fell Ridge on Blencathra. Swirral Edge on Helvellyn is barely worthwhile, in my opinion, but it does make a good descent route after Striding Edge.
Post edited at 18:40