Hartington blue,,or Stilton. I can't really tell the difference, but I do know that they are both made in Hartington which is situated in a wonderful area, on the borders between Derbyshire and Staffordshire. Have visited the area on many occasions.
Try the cheese on toast for breakfast with a spread of marmalade on top. Absolutely delicious and will turn a few heads if you ask for it, as I have done, in top class hotels.