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Before someone notices that I have over-egged the numbers, there are 25 spp. in the genus (just 'dozens'!), of which only a few are sufficiently distinctive enough to be easily done from a pic. It just seems a lot more when working through the key!
recording wildlife with The Recorder's Year on www.hbrg.org.uk/TRY.html.
This is one of the Platycheirus scutatus complex. The 6th photo (with it hanging upside down) clearly shows the two clumps of tangled hair at the base of the front femora, several show the typical small round spot on the 2nd tergite, and the shape of the front tarsi is also quite distinctive (see plate R7 in Stubbs & Falk, 2002).
However, there are now 3 species in this group (P. scutatus, P. splendidus and P. aurolateralis). These need very detailed examination of the mid tibia and the wing microtrichia - so are not possible to separate from these photos.
Hoverfly Recording Scheme
Lat/Lng: 52.1, -3.4
OS grid ref: SO0451