Interesting discussion over the last few pages. Not sure if the failings of the unit in raising the alarm when the reports came in explain anything or take away anything from the prosecution's evidence. If it did you would have thought BM would be driving these points home at every opportunity to create doubt
The prosecution have undeniably proved someone deliberately added insulin to cause harm. There's no other explanation at present, e.g. the Pharmacy messing up, another person accidentally adding insulin when creating the TPN mixture, that has been shown to be impossible and was explained clearly by the Pharamcist.
So that leaves it to being someone other than LL that has adminstered it to cause harm. I think BM realises the weight of medical evidence is too strong and that the circumstantial evidence is now heavily pointing to one person. I'm happy to be proved wrong in the coming days when the defence have their say but it will need to be something big to change the course of the trial IMO.