Hi Quiller,
I'm not sure if you've come across the newspaper article related to Bertha's death (Extract below). It is available on FindMyPast with a subscription but as I only have access to Irish records I can't open it. While it may not give you the cemetery, it does give you her last address and the date. Sadly, it looks like Bertha gassed herself using the oven.
GAS OVEN SUICIDE.
SHOCK FOR ASPLEY HUSBAND. The story ot early morning tragedy i n 'Aspley home was told at Nottingham'inquest yesterday, on Bertha Tutin, 39, of 74, Raven drive, Aspley. who died from gas poisoning Tutin printer, said he went to bed 10.30 p.m. on Saturday
11 February 1936 - Nottingham Evening Post - Nottingham, Nottinghamshire, En