To answer ScouseBoy's question (and anyone else who is wondering if I have mixed two people up)
Details on the marriage record of the informant, the son of the deceased, states his wife's and her father's name.
Census records for the son and his wife show the previous household entry is for his wife's parents and two of her younger siblings. Her father states his occupation is Registrar of Births, Deaths and Marriages. The next household contained another son of the deceased i.e. the informant's brother.
The Registrar who signed the death certificate is the same name and initials as the informant's father in law.
Also the same year that the son married the daughter of the Registrar, the widow of another of his brothers married a son of the Registrar. At that time the the father was stated to be a farmer. He was described as a retired farmer in the census prior to him giving his occupation as Registrar. His burial entry states he was District Registrar.
I mentioned this relationship because it was an interesting aspect to the death certificate. I don't think the persons who asserted that information was suspicious were aware of the relationship between the informant and the Registrar. In fact I did not realize it for some time myself.
I think what I can take from this discussion is that sometimes the death certificates of unmarried woman did record who their father was and his rank or occupation and this would not be an unusual or questionable thing to happen. However it would be subject to how the Registrar proceeded in carrying out his duties and how much the informant knew or was willing to impart.
I had hoped there might have been a few more examples that I could cite to strengthen my case that there was nothing unusual about the certificate in question though, as I stated in my first post, spinster's certificates are not what most people spend their money on. I obtained this particular certificate because of the questions raised by other researchers and the fact that this spinster did have children and her parentage has not been satisfactorily established.
The certificate from the 1950s was in bundle of family papers that I was given.
If anyone has seen examples of such death certificates for an unmarried woman I would be grateful if they contacted me by PM.
Many thanks.
Venelow
Canada