Interesting and enjoyable TR, Karl: looks as though you had a good outing despite the weather.
My wife, son and I walked up past Scales to Kentmere Reservoir a couple of months ago, and I spotted that path up into Rainsborrow Cove - looks as if there might be an interesting way up to the top from there! I'm also intrigued by that slate cavern at the foot of the crag - I like that sort of thing.