This is a photo of my grandmother, Margaret May Whitley. She is the little girl on the window sill with the dog. This was taken in about 1928/1929 in London, just before she moved to Australia with her family.
The formidable lady in the photo is her Aunt Rose, her fathers brothers wife. Her father was John Whitley. I'm not sure which of his brothers was this ladies husband. The possibilies are Robert Whitley and Walter Whitley.