Ok, so I now have Florence's birth certificate and its caused me even more confusion.
Details are:
birth Seventh June 1888 at 2 Richmond Terrace, Salford
Father: John Smith, Labourer
Mother: Fanny Smith formally Suckling (or Buckling?)
on the signature, description box it says: x The mark of Fanny Smith mother, 2 Richmond Terrace, Salford
Registered nineteenth July 1888
I don't have Rose's birth cert yet but all I have now are new questions and no answers and how does John Smith fit with William. Were they brothers?