Large caddis, 1 inch long.
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I havent been looking at caddis much lately. I wish I had had a ruler beside this one. The main thing I remember about it was its size. It was big, I would say over an inch long. Phryganea proportions.
I have seen mant Stenophylax since this and they have generally been smaller insects.
Lat/Lng: 55.055, -6.119
OS grid ref: NW370811