A white-shouldered house moth, Endrosis sarcitrella (Lepidoptera: Oecophoridae) on the wall of my bedroom back in October of last year. The grey markings on the wings can vary quite a bit. See here for a photo that matches the above one fairly well. This species is a widespread pest as its larvae feed on dry vegetable matter such as flour and clothing.
Photo taken in Reading, UK, on 2009-10-12.