The woman is Mabel Alice Greenwood (nee Walton) b.8 Jul 1892, d.21 Mar 1968.
The man is her husband Ronald Greenwood b.12 Apr 1893 d.12 Aug 1973
The young girl is their daughter and my mother Mary Alfreda Greenwood b.23 Feb 1920 d.12 Oct 1984
I can rule out 31 Jan 1934, Oct 1936 and post Oct 1946
They were pasted into an album, so I don't have access to the rears. They are printed on normal photgraphic paper, the sort chemists used to print photos on.
Thank you!
Roger