Fly fishing Upper River

I spent a glorious morning on the upper river today, . I'm still a complete novice at fly fishing, but really enjoying learning the art of casting, tying flies, techniques etc. The closest a got to any fish today was seeing some shadows as they bolted off. The water is painfully clear, and i'm told they are notoriously difficult to catch around here when the river is so low. However, a nice 5mile walk, amongst lovely surroundings...