Martin Drake has kindly provided some information on this one - it is "definitely a dolichopodid - there are few small metallic green flies outside chloropids (the others are big - strats and the like). Your fly is very likely to be Micromorphus at that size, and the straight long veins, greyish thoracic dorsum, wide tapering face and very wide frons, and flat prescutellar depression all point in that direction."
Martin tells me that there are believed to be three species in this genus in the UK but the taxonomy is not yet confirmed.
Martin Drake has kindly provided some information on this one - it is "definitely a dolichopodid - there are few small metallic green flies outside chloropids (the others are big - strats and the like). Your fly is very likely to be Micromorphus at that size, and the straight long veins, greyish thoracic dorsum, wide tapering face and very wide frons, and flat prescutellar depression all point in that direction."
Martin tells me that there are believed to be three species in this genus in the UK but the taxonomy is not yet confirmed.