Next best to rent is £3.49 (SD) at Google/Chili/Microsoft, same price to buy at Sky. 92% Rotten Tomatoes score. Theatrically released in October.
When Edna (Robyn Nevin) - the elderly and widowed matriarch of the family - goes missing, her daughter (Emily Mortimer) and granddaughter (Bella Heathcote) travel to their remote family home to find her. Soon after her return, they start to discover a sinister presence haunting the house and taking control of Edna.