A pretty stunning sky! I was in almost exactly the same spot just a few weeks ago and didn't get nearly as lucky with the weather. I got rained on for most of the time I was on the island (clear blue skies the morning I had to leave of course) but I did manage to sneak in a wee shot from Elgol that I was happy with.
Just after taking this I bumped into another photographer as we both headed for the same big collection of rocks by the water's edge. He was a German lad and had the most stunning big Large Format set-up. I've not had camera envy like it in years!
Dougie