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I found some small slim orange flies on some toadstools growing from a rotting log. Reminded me of Psilidae, but a close look at the photos shows a row of bristles on the leading edges of the wings, so maybe Heleomyzidae…? and Suillia bicolor looks a good match, but I may well be wide of the mark. Please advise!

c 8mm 10.10.2104 Wickwar, Gloucesterhire in an ancient woodland.