I found this leaf-edge roll on Comfrey today. It looks almost identical to that of Parornix devoniella, but the nearest hazel is ~3m away, and as far as I can tell, (the top leaves are not accessible), there are none of the blotch mines of that species on it. There appears to be nothing that mines Comfrey that creates such a roll, so a bit of a puzzle! The roll is 3cm long, and empty apart from frass at one end, (the left hand end in the image below.)
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