Just checking in after work and thank you so much for all of the replies :-) The enhancements are great as well so thank you to Peter and handypandy for your time. That line at the bottom is torn right through and has Sellotape on the back!
Thanks Jim for the date suggestion, this will definitely help narrow down any suspects.
I've attached a photo of Fanny Ginifer nee Keepings who was born 1884, with her son Jim b1908. It is a very tiny snap so hope it is clear enough. I think she does resemble the mother in the original photo (which could be her mother going by the date) However I have checked the census for her family and Fanny appears to be an only child so that seems to rule her out.
I will keep looking :-)
Thanks for reading
**edit** please bear with me as I make the picture fit the page better