OK final question. I have Elizabeth Gowans birth record 1915 showing John Gowans as Father, Helen Bisset as mother . Both signed the register yet Elizabeth is illegitimate. How does that work out?
Proof positive that John and Helen were not married.
The law assumes that a mother's husband is the father of her child, unless she declares otherwise. If the birth is illegitimate, the father's name can only be recorded on the original birth certificate if he accompanies the mother when she goes to register the birth, and signs it alongside her.
So when you see both parents signing a certificate it means they were not married.
Also, a married mother's name is always recorded as xxx yyy M[aiden] S[urname] zzz, where xxx is her given name, yyy is her husband's surname and zzz is her maiden surname. In this certificate she is just xxx zzz, again proving that she isn't married.