Sorry for the delay, I've been digging out my census records in order to find the addresses.
Edna (1907) - her parents Thomas William Balmforth and Margaret (nee mason) resided at 10 Stanley Terrace, Wavertree in 1901, and by the time of the 1911 census they had moved to 52 Gainsborough Road, Wavertree. I believe both of theses houses are still there. I don't know if they lived anywhere else in between those two dates, or where they went after Gainsborough Road- if at all.
I hope this helps. I do have a photograph of Edna's older brother Eugene (1898), but none of Edna or her parents. I shall contact my aunt to see if she knows of any other addresses etc.
Feel free to pass my e-mail address on.