Just a quick mention regarding the phone/s. While Sheila was staying at WHF for the final time,didn't she phone her friend Tara to apologise for her mother having dropped off a religious book to her and at some point the phone went dead ?
Was there already a fault on the line,or had June listened in to the call and cut her off ?? This was shortly before the tragedy. Sheila had gone ballistic saying that the phone was bugged.
Because of this " incident ",maybe Sheila had got wise to her mother's actions,which would prompt her to remove or hide the " floating " blue phone ?