In reply to minus273degrees:
Just totted up the Gritstone severes from the current BMC guides, that's Grades of MS, S, S4a etc.
There are +-1044 Severe graded grit routes. I've done 42% of those, and many of the remainder are unclimbably vegetated, prohibited access etc. Its not a list, its not even comprehensive as some crags are not in the books (Torside Clough or Bottoms Quarry anyone?) And I dont have the stamina for the Limestone yet! But it gives an idea of the amount of Severes in the Peak.