No interactions present.
Thanks for ID David.
I'm a diptera novice but thought I'd have a go with a key (http://www.field-studies-council.org/fieldstudies/documents/vol5.3_143_A...) alongside the Muscidae key http://www.royensoc.co.uk/sites/default/files/old_res_handbooks/Vol10_Pa.... I thought I could see axilliary vein 7 converging on anal vein 6, though it is shorter than 6 and I had to extrapolate where it would get to if it were longer. If you could spare a moment to give me a quick tutorial, I'd be very grateful! What is wrong with the form of the anal vein?
it is your extrapolating that is at fault. If you extrapolate A2 such that it exceeds A1 then it will extent beyond the wing membrane at some point. The length & form of anal vein & A2 in photo conform well with fig 4 in Fonseca and not with fig 1A. Are you looking at the specimen or just photo? if latter then using a key to name Calypterates will prove very frustrating.
The fly itself flew away shortly after the photo was taken. I was very pleased when the veins in Fonseca fig 4 seemed to match the photo so well, but got lost trying to get from there to further on in the key. I'll keep trying though, making the only person in the house who wants to see more flies in the kitchen! Thanks again for your help.
Lat/Lng: 52.061168, 1.159024
OS grid ref: TM166450