Thanks for this. These (your first four,) are reasons people cite quite often and at surface level they look important. But they are flawed if you look harder. Just to take these one by one, so may come and go.
Evidence placing her cotside
This doesn't really exist. The prosecution gave a very vague account of when critical events "must have" happened. Their experts didn't commit themselves on how long the mode of attack would take to produce an effect.
So you have Lucy Letby, one of a maximum four (usually three) nurses qualified to do intensive care on the night shift. These nurses will be moving between four rooms, including in a supervising role. They will take breaks and cover for one another. They will leave rooms to get medications. They will all, in the course of a night, be alone with children at some point.
Now say you have a prosecution expert who says they can place the damage at a range of times. Say you are relying on medical notes to work out was where when, and you have all the gaps because people don't note when they are nipping out or swapping for lunch, and you can fill the gaps if you want to by speculating or accusing her of lying and changing notes.
Say you are using door swipe data too. Later, it will be discovered that the door swipe data was wrong. Police mixed up the record of people coming in and people leaving. Because security systems were designed to stop people leaving with babies untracked, not for clocking on. The ward even has one entrance with a number pad code, and somebody has kindly written the code beside it. Midwives take shortcuts through the unit using this door.
Then there are memories. There's a disturbing pattern to police interviews vs trial. At police interview, you have nurses saying one thing, in court another. They're not sure. They're doing their best to recall. It's all contradictory
And finally you have immediate collapses. What if she's alleged to have done the harm in front of eyewitnesses (who somehow didn't notice her doing it). Well, these were small nursery rooms. And she's in the notes. So was she there?
Yes, for the four babies who died when she was caring for them, she was there. You would be much more concerned if she wasn't, given her role. But the scenario the prosecution presents is that, for at least three of these four, she must have inflicted fatal damage while surrounded by other people, in one case at least while they were all working on the child.
Happy to go into detail on individual children or provide links if anyone is interested, but it needs to be said. By the method the prosecution used, anybody of duty could have been placed cotside where she was supposed to be working silently and invisibly. And in other cases, where we know she was present, the idea she could be proved to be there by eyewitnesses, but not seen doing anything, is pretty shaky.
I'd be worried about working in any role on a struggling ward, seeing how the prosecution was able to present such flawed and flexible "evidence".