I found this hoverfly last Saturday, and managed to capture this reasonable image. It's notable for at least one reason in that it was a new species for me and for the garden.
According to Stubbs and Falk, it's a common species in Southern England associated with a variety of shrubs and plants, including umbellifers. Interestingly I found it just above a large patch of Alexanders which I allow to grow in the garden, so perhaps that makes sense.
That was my 15th species of hoverfly for our garden, check out photos of each here: http://www.flickr.com/photos/32653656@N03/sets/72157612923077417/