I had a comment yesterday that reminded me that I hadnt told you what fly I caught it on. it was a grey duster, quite a larhe size, 12.
I just tried to match what was drifting past my chest.
If you look at the photo below in the post below , the one that shows to the right of where I was standing you can see a rise form. IT was the rises I was casting to. In fact the more I think about it I think that they were rising to something totally different but the fish probably got agravated to my different fly that was going past them.
It was fantastic.