Thank you for the replies - yes her parents were Matthew and Caroline. I should have included that. I seem to remember an address for her as The Star (pub I presume) Bransford Road, Worcester - how might I find that on the 1911 census ? I have her - and mom - on the 1921 census. Mom is with grandparents in Malvern aged 6 yrs (doesn't fit in with her birth registration), Flo is a Boarder in Birmingham working in laundry, she used to send money back for mom's 'keep'.
Interesting aside - three sisters each had an illegitimate child, each went on to marry in later years and none had another child. Two of the sisters acknowledged they were the mother, Flo never did and mom always called her Aunty Flo. Only in Flo's Will did the truth come out.
Anyway back to 1911 - mom's birth (Elsie May Leighton) was registered in Aston, Birmingham so Flo might have been shipped off to a mother and baby home .