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The male could be something like Delia piliventris, though there are other species with strong setae on sternite 3 and piliventris is not listed for Hungary (though present in Austria). Another possible candidate, D. penicillaris has a ventral swelling on the second section of the mid tarsus (hidden in the photo) and is listed as doubtfully present in Hungary. It could just as well be another species not in the British key I am using.

Try to catch a male and send it to an expert for identification!

The female is definitely not D. piliventris.