Conisternum decipiens

I ran this fly through the scathophagid key and it seems to come out easily enough as C. decipiens, but it is not a species I have come across before and there seem to be very few images on the interweb! Just wondering if anybody with a bit more experience could tell me yay or nay. During drying the femora have flattened and twisted making them look more swollen than they were in life. From 25th April, Rye, East Sussex