Thank you for your message - I am ever hopeful no matter how long it takes! Yes, they are the family listed on Alan Stoner's site. You are correct that Mary Louisa died in Brentford 1939 (14 May actually) In one of her letters to my grandmother she mentioned that the family vault at Kingswood was almost full, so I am not sure whether she was buried there or not, but her husband lived a further 10 years and he would have known her wishes. However because Edith was (supposedly) the last to die, I am not sure who would have made arrangements for her burial and whether they would have interred her with the rest of the family at Kingswood. I know the tree on Ancestry with the photo (the owner follows Edith's husband's family) I have seen the death ref. but am not quite convinced yet that the Portsea death is correct. I guess I need to enquire about the church burial records.
Thank you again. Regards
Kina