The presence of bulky rucksacks does give some clue that the sisters were somehow on the move and not planning to end their lives. However, genuinely the area behind the path is full of overgrown bushes and a very high wall, and I don’t see how they could have cut through that. Behind that area is a long street with fish houses, car repair garages and storage, no side streets or places to hide. I’m reliably told there is a lot of cctv on that road due to break ins and any footage will have been studied. Especially recorded at 2am and in knowledge of what subsequently happened.
I am here because unfortunately in 2014 I discovered my sister was the subject of a Websleuth thread. She disappeared into thin air on January 21st. While desperately looking for anything I chanced on her name in this website. I was comforted that so many people were actively concerned, even out of simple curiosity….and perhaps finding leads that the police could not. It gave me great comfort. Sadly, her body was found two month later and the verdict was suicide, which the family had said from the start. I was at the sharp end, and know a bit about protocol after a person has been reported missing. MOO, but I do think this is either a terrible accident like Nicola Bulley, or a double suicide. Interestingly, my sister took a large rucksack when she left the house to end her life.
Sorry to hear about your sister! Sending love.