Feeding on flowers of water dropwort
Be aware that the wing venation, with a looped vein, is also found in the bee-mimic Merodon equestris. That species has legs wholly black, though.
My Flickr photos...
Lat/Lng: 50.613310321681, -2.4594783782959
OS grid ref: SY675793
A brackish lake that used to be the estuary of the River Wey, now an RSPB reserve.