I agree with you that the family must be suffering terribly, not being able to bury their child. I also agree that the police probably already have a suspect (or two) in their sights.
I'm not quite sure what to think anymore...did have numerous theories, first of which was the B/F...having witnesses to the time he should have left Bristol ...decided not to travel alone..maybe rang Jo, asked her to pick up a pizza and drinks and arranged to pick her up. For whatever reason, they argue and Jo dies. He decides to continue to Sheffield, with Jo hidden in the car...arrives a little late in Sheffield..visits and returns on Sunday. From the Motorway there is a back route which would take him near where her body was found. Jos' body is dumped but he takes her coat, bag, keys, drinks and boots to place back in the flat...whilst removing the boots, one sock stays inside the boot but in his haste and in darkness[he doesn't realise until he gets back to the flat, disposes of the sock..maybe by wearing it? The pizza has been squashed in the struggle so he just dumps it...maybe from the car window on his way back (over the second bridge crossing to Clifton). He arrives back at the flat...with his bag containing Jos' belongings..which would not attract interest as he had just returned from a trip...sets the scene in the flat...maybe has a glass of cider..composes himself and eventually reports her missing.? Only started to suspect him because of his appearance at the appeal for news of Jo. For an outdoor pursuits enthusiast he seemed to be more in mourning...than searching for a missing person.
Second theory is that the the two oddball 'snowmates' next door are part of a paedophile ring which used to meet in Jo's flat (when the previous tenant, now in prison) was still living there. Maybe Jo saw or heard something which would expose them all and was silenced because of it? her body could probably have been taken through the hedge into the neighbours garden and quietly put in their car to dispose of later?
With all the 'drip' information that the police keep giving us..I suspect they have a very good idea of what happened but proving it.....that is what is taking all the time. I really hope the B/F is innocent...if only for Jos' parents sake...they have demonstrated great fortitude and dignity and I just hope that this case is solved very soon.
Sorry all....got carried away and forgot to say HELLO....find this site and your comments fascinatingI]