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I think this is a type of Muscid, though the venation is unusual. Using the venation as a guide, I believe it to be in the Helina genus. I have used the web site
http://www.commanster.eu/commanster/Insects/Flies/wings11d.html
but nothing matches perfectly.
It is somewhat like Helina lasiophthalma, and Helina trivittata.

I see that it has hairy eyes - pale brown and quite long.

I have no proper views from the side because of the dung (!)
Found in south Cumbria, UK, on cattle dung.