Good morning, Cherwell. I do so enjoy your responses. The excerpt you have in italics (as quoted above) is fairly straightforward to me - so tho I'm not saying you're wrong ... I'm merely suggesting my interpretation. Indeed, any sentence may be pulled apart and made-to-fit theories, however I believe David & Theresa knew their daughter better than anyone. That Jo had told family, colleagues and friends she'd be spending the weekend alone - get some cooking done - tidy up the flat ... meant ... just that.
So we know Jo especially planned to be "in" all weekend to do her "domestic chores". Nothing was done. Tabak took the pizza ... forgot the receipt. Maybe he took it to eat? Maybe he shared it with TM the next day? Maybe he disposed of it together with the sock - never to be found again?
It had to be very, very evident no tidying occurred for her parents and Greg to have reacted to the "state" of the flat. No cooking; no tidying up. All her belongings were there - including phone, keys, coat, etc. Her phone is a huge tell-tale sign (cell ping towers/records). Jo was discovered in exactly the same clothes as seen on cctv on the Friday evening, sans coat, a sock and her shoes.
Neighbours and previous tenants clearly confirmed (as do the crime scene photos) that movement between the two flats would go completely unnoticed. Looking *too* much into a very clear and specific statement by her parents is not that ambiguous to me, of course.
Does anyone else see that Jo's parents knew she was going to tidy up; nothing was done; Jo was in the same same clothes and zero movement/response tracked since her estimated arrival home - circa 9pm Friday 17th Dec?