Fly about 7mm long, looked rather like a fruit fly initially but then looking at it again seems a bit different.
No interactions present.
Mike, I think you may be correct in thinking it is a fruit fly, family Drosophilidae, and to my eyes it looks very similar to Drosophila repleta, but I'll need to do some more checking when I've got a key in front of me before suggesting that as an ID.
See for comparison:
Entomologist and biological recorder
Small Diptera... certainly looks like the image linked to, and definitely not Fanniidae as per my suggestion.
ah, but that one has red eyes, obviously been on the town more than mine had.
I don't think Drosophila genus -- most/all UK species do have red eyes.
Not sure it is even Drosophilidae but can't suggest anything else.
I can't make this out to be anything other than family Drosophilidae. Although Mike's photos show a lot of detail they don't quite show enough of the hairs on the face and thorax to allow it to be keyed out fully, but what can be seen matches Drosophilidae very well. I think Ephydridae is ruled out due to the plumose arista on the antennae (the 'feathery' bit that is on the main antennal segment) - some ephydrids have the arista plumose, but all the hairs are above the stem as far as I know.
Within the Drosophilidae I can't get this into any genus other than Drosophila, and having gone through the keys my best guess is now Drosophila hydei (D. repleta is very similar but has a darker spot on the costa of the wing).
I agree that the lack of red colour in the eyes leaves a question-mark over this, but the other markings seem to match very well, and if it is not Drosophila hydei it is something astonishingly similar to it! D. hydei is a regular in my kitchen.
Just noticed that Mike said this was 7mm long, which is about twice the size of Drosophila hydei, so will continue to ponder this one ...
I sought further opinions on this one from the Dipterists Forum, and so far there is agreement that this is Drosophila, either hydei or repleta, see:
Have uploaded a couple more images taken at the time. I tried to persuade the fly to sit on the iSpot card scale but it flew off instead, before flying I could see it was more than 5mm but only a bit so I estimated 7mm long including to the end of the wings. Obviously our kitchen is much more nutritious than Martins growing the flies larger, incidentally our kitchen has been piled high with pumpkins and marrows from the allotment for several months so might have a slightly different fauna than the normal kitchen fruit.
Lat/Lng: 52.0, -0.8
OS grid ref: SP8834