it's all a bit speculative though really.
It's very easy to sit here and say "oooh I think he did/went/said/thought," based purely on the reporting of what has been said this week. Of course what he did sounds chilling - the prosecution have to make it so in order to have the best possible chance of securing a conviction.
But from the defence's pov so much of the evidence is still circumstancial, he "might" have had the body in the boot of his car when he went to asda - did he? There's no way of knowing that for sure, but it is a statement designed to provoke an emotional response - that being, how chilling that he could drive to asda and shop for crisps with the body of his victim in the boot of his car. Equally the statement that he ate pizza - we don't know that it was the pizza, just that it was pizza. It's not uncommon for someone to eat pizza when alone on a Friday night, but much more chilling to think that he murdered someone and then ate the pizza she herself had intended to have.
In fact the defence could argue that he hadn't had time to eat Joanna's pizza; after all, he killed her, went to Asda, twice, then went to dump the body. So when would he have had time? Perhaps he therefore had pizza before going to Joanna's flat...
Equally the defence might argue that his trip to Asda was undertaken while in a state of delayed shock - after all if he had accidentally killed her, having no previous form for this sort of thing (and tbh I think if he had a past this would have been brought up early on), he might be in shock over what he'd done. People do strange things when in shock...
I'm mostly playing devil's advocate on this, but I think that we shouldn't get caught up in the drama of what's reported in the press because A there's a lot that won't be reported purely on the basis they don't have the print space, and B, we've only heard the prosecution so far, and tbh the prosecution have little actual "evidence" that it was deliberate murder..
I think being on a jury in such a trial must be incredibly difficult, partly because of the amount of coverage this case has already received, and partly because there is probably so much pressure to find guilty (from the public) due to the high profile nature of the case.