Narcissus Fly - East Blatchington - 25.5.2014

Trying to add to my 'Bees on flowers' contributions, I snapped this lady in a fur coat, only to find, on consulting Collins Complete British Insects, that she is in fact a fly. The way the wings are folded should have told me that.* Mind you I suppose we should be grateful to all the pollinating insects, not just bees.
*I think I spotted bees with wings folded like that, while looking for another identification, so maybe I need to revisit this one!