Interesting point, I am pretty sure while I was up photographing these Puffin's, I was the most Northerly person on the British Isles, for a couple of hours.
I was on the most north westerly point of Unst, just beyond here, in the summer you are not allowed as it an important sea bird breeding colony. There had only been one other car in the carpark as I began the long climb up, and I met the owners of that as they climbed down.