I want to eventually purchase the death certificates but they do get rather pricey and from what I was told it may not have all the names on there anyway because it is only what information is given and is often accurate. I have looked a little into TROVE but I haven't found it of much help with the Kirby side of the family, ideally if my grandparents didn't die when I was young I would of been able to pick their brains.
I have found them on BDM but it doesn't show parent's names on the website

and for the one that I was trying to rule out the father's name is the same (but a common name) but not the mother's but have also been told this could also be down to error as well as to who gives the information.
Thanks for the assistance!