Clun Forest is one of the Down type breeds, originating in the Welsh Border area. It should have an average staple length of 2.5 to 4 inches, and a micron count of either 25-28 (In Sheep's Clothing) or 28-33 (Knitter's Book of Wool) depending on which book you check.
This is a very nice wool, and I really, really like it. My sample came from pre-washed fleece from Katrina's Wool World. It is soft (by my inexpert guess probably around 26/27 microns), fuzzy, silky, and has an average staple length of 4-5 inches. The locks were mostly intact with a nice crimp and yellow tips. I'm hoping the yellow will come out in the finishing. If not it will just make the wool more cream colored than white. Or I could dye it.
A good deal of the locks I carded were closer to five inches than four which made the carding a little tricky, but as long as I was careful, it made really soft, fluffy rolags that were a pleasure to spin long draw. I only carded enough for the sample. I am combing the rest.
A 2ply and a 4ply sample spindle spun long draw from hand carded rolags: