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Looks like Delia floricola R.D. There are nearly 13 species in this Delia cardui group in Europe and Middle East, including some as yet undecribed.

Delia penicillaris Rondani is now restricted to southern Europe. The British (and Palaearctic penicillaris is now named penicilliventris Ackland for reasons to long to quote here. The other British species with long tergal and sternal setae is penicillosa Hennig. D. floricola does not have long tergal setae as in the photo. I have not checked to see if it occurs in Hungary.