For those following this thread, I have today received a copy of the Ethel Wills birth certificate.
Ethel Wills, daughter of George Wills and Winifred Quin, born in 1928 in Salford, was a guess at who Ethel Quin, the subject of this thread, might have been.
So the Birth Cert says
Certified Copy of an Entry of Birth
Registration District West Salford
Year 1928
Entry
211
19th January 1928 2 Stott Lane, Salford UD
Ethel
Girl
Father George Wills
Mother Winifred Wills formerly Quin
Occupation of Father: Labourer in Emery Mills of 111 Robert Hall Street, Salford UD
Informant: Winifred Wills, Mother of 2 Stott Lane, Salford
Registration date: 25th January 1928
Registrar JH Gibbins
And note far right: Adopted. A S Payn, Deputy Superintendent Registrar.
My thoughts are that Ethel's parents seem to have been separated at the time of her birth, and that their baby was adopted.
There was a further daughter, Agnes Wills (mmn Quin), born October 1929, who we have been unable to find and it is possible that she might also have been adopted - she may not, indeed, have been the child of George Wills.
George Wills and Winifred Quin Wills' first daughter, Winifred, born 1924, is found in 1939 living with the widow of her father's brother, not at the address of her father and stepmother - whilst this is just a snapshot in time, it may have indicated that the family broke up relatively soon after the marriage.
Added: after posting, it's also just occurred to me that, depending on the date of separation of George Wills and Winifred Quin Wills, Ethel may not have been George's daughter.
He might have been shown on the certificate as father purely because the couple were still married, and therefore any child born would be assumed to be the husband's child.