I've recorded Madiza glabra - mainly gravid females - close to home (Codford, Wiltshire) and have a few interesting photos. It occurred in large numbers along with a Chloropid Thaumatomyia notata on the inside of upstairs windows over a period of several weeks. I'v not seen M. glabra in previous years and I'm sure I would have done so had it appeared. There have been no earlier Wiltshire records. A few items in the literature note that this and related species are attracted to specific chemicals which tend to occur in the domestic environment. Has anyone else noted similar behaviour?