Thank you for the questions.
He died of a heart attack in Oranjemund, Namibia (I mention this as most of the registries seem to concern themselves with war deaths). He is of Scottish heritage, it would seem he took names from both his paternal line and maternal line, but went primarily by Grant. Although we, his descendants, all go by Alcock.
I have some info going back as far as his great grandparents but I doubt much of this would be of value as it is all Scottish info.
He was a Warrant Officer, is all that I know. My grandmother is woefully short on information.