In these images the gills are beginning to develop a brown colouration which I have assumed to be some of the spores maturing. That together with fruit body shape and attachment to substratum appear to fit the genus Crepidotus. In various picture books this example accords with images of Crepidotus variabilis. However, I'm not familiar enough with the local species to be confident with such a determination. These images are about 20-25 mm across