In reply to ConstaBern: You may be disappointed in other areas after Dorset, in terms of low/mid grade Sport it is probably comfortably the best UK destination. The only other area that comes close is North Wales where there are a fair numbers of routes in your grade range on the A55 Limestone Crags, at Trevor Rocks near Llangollen and in the Slate quarries (some of the levels in Australia have a host of lines at F5 - F6b, get the Ground Up Slate guide).