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Top: Mating Sarcophagidae, flesh flies. Someone very specialised in the family may be able to tell you what genus or even species, but not me. ;)
Middle: Normally it is difficult to tell a species from a anterior shot of the face, but a calyptrate fly with reddish colour on the lower face could well be Calliphora vicina, a blue bottle.
Bottom: Probably even more difficult than the top one to get a species name on it. It is a female of Sciaridae (dark-winged fungus gnats).