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It is not Phaonia with these veins. Try Musca autumnalis.
Please look at the angled vein showing clearly at the end of its left wing. That tells you it cannot be Phaonia.
I see that the fourth wing vein, which I think this is, should be almost straight in Phaonia so, granted that the abdominal patterning is a bit faint here, I agree on M. autumnalis.
Lat/Lng: 51.4337, -2.7624
OS grid ref: ST470707