Nice TR Dave - I did exactly that walk on 14 July and then went back with an old friend on 31 and did the same route, though taking in Harter Fell and descending via Gatesgarth Pass. Lovely area to walk in.
I've never heard about the fairs before - thanks for sharing.
Those flies look evil - no wonder you didn't hang around on Kidsty Pike - shame though, I've eaten my lunch near the summit a few times - great view!