I'm currently unearthing numerous natural shafts in the north-west pennines. The Doline is around 2 miles long with known caves at either end. One of them must go sooner or later?
Also found various swallets/resurgences just north of lake district national park (and therefore t'dales). Nothing like the development of the dales, tight bedding planes mainly and some of it in pink limestone - weird.
Current dig temporarily on hold due to buzzard attack.