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This species was commonly seen on buttercups this weekend. Can anyone help with the ID please?

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another view

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I can say it's a muscid but others will say more, I am sure :)

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Do you have any closer view of the second picture ?

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This photo isn't very good and probably doesn't add much, though it is from a more oblique angle - hope it helps.

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This is not the same fly, this is a male (eyes contiguous), the former was a female.

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Sorry Stephane, it was the next photo I took so must have focussed on a different fly. There were many, nearly every other buttercup seemed to have a resident fly! Is it possible to narrow it down from the two previous photos? Many thanks.

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There is not garancy that 1-st and 2-nd flies is the same too.
Nevertheless:
1. Muscidae? I think so, I think all 3 images are of Muscidae.
2. N2 (and probably N1 too) - my guess is Thricops.
3. N3 - I don't know

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Thanks - I must take more care to record my photos in future!

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The middle one looks so familiar to me - we have lots of such flies around, and they were determined by Michael Ackland as Hydrophoria lancifer (Anthomyiidae). I'd really like to know why this one should be a Muscid (or can you see that the anal veins do not reach the margin? My eye lacks your skill).
Regards, Sundew

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4 postsutural dc.

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Also it seems that it has pd in apical 1/3, also N1 has "non-Anthomyiidae abdomen dusting"
I'd rather cancel Thricops guess, I'd say N1 and N2 most probably belong to Azelini :o