"There are differences throughout the islands with people in areas being similar to other people in said area!"

... well the ancient Egyptian Pharaohs deliberately attempted to refine the purity of their bloodline
through the practise of incest...

so who know's what's been going on for centuries in the more isolated areas of the UK..???

"Most of the "Celtic" areas are also "sheep shagging" areas"

.. at least sheep shagging momentarily takes the focus of attention off their sisters...???