Around the middle of last year I established two theories. I think it’s all you can do, the police with their vast bank of evidence still look at two lines. One as you suggest she went somewhere else on the 18th, and one she left for work on the 19th. The breakfast pots - don’t hamper your theory in my opinion as if you think through it logically there’s an accumulation. Similarly her bed - was it made or not slept in? Her rucksack however - must of been taken out by her, happily and alive. No signs of a disturbance inside her home, no blood, no screams. In my opinion whatever has happened has happened away from her home. I think because she’s not seen on cctv on the 19th - there has to be an explanation - could it be that she left by the rear door on the 19th into Heworth place looking for a lift to work? Having visited the site many times - if it was me(as Claudia) and I was getting a life from Heworth place - I’d go out the front door and round - the back alley is all overgrown and at that time of the year wet, messy - I just find it hard to visualise