I am so sorry to hear of your horrific loss MrsT, lovecat and HM.
i live in the area where Joanna lived and know well the area she was found. I don't go to pubs and I live alone - I can honestly say I have had no-one to talk this through with (which is why I googled here). I have relatives, who all live in the area, but what with christmas and also said relatives being very distressed and also frightened about this (it cast a cloud over the whole christmas in bristol), there hasn't been the opportunity to discuss it re theories etc.
As a result, I have found this thread very helpful (apart form the bickering). It is natural in the face of the tremendous shock a case like this engenders to discuss theories in order to try to make sense of it, particularly if you are local, particularly in the face of very little being said by the police.
fwiw, the route she took from the Ram pub to waitrose, then tesco express (also baryah's re cider) is the logical route to take. Waitrose is expensive and you can get some choice things there (we only have 2 in bristol - the other is a long way away) which you ca't get anywhere else - she may have taken the opportunity while she was in the area (or the pizzas were too expensive, so she went to tescos instead). the route she took makes perfect sense if you live here. It was also dark so she would instinctively have used well-lit roads.
all of this the police will be looking into and also have the capability to test her body (bless her) for evidence re did she eat the pizza. the postmortem took so long because her body was frozen. I perfectly understand the very emotional comments made by her father - he is beside himself and probably not fully engaging with the horror of what has happened (that comes later, unfortunately - and is vicious
).
my heart goes out to this poor family and to all you's who have lost someone in similar circumstances. I have lost someone close to sudden death and that was bad enough - I can't imagine how awful it would be if it was murder. The suffering of those left behind is immense and goes on for a very long time - always tbh.