I think NJ KC has played a blinder with the post-it note.
He's hardly touched on it, except for getting her admissions that she had a very busy social life, a house, a car, a boyfriend and a good job, as to call her out on her answers to why she wrote she would never marry or have children being that she was isolated for two years and no one would want to marry her because of her redeployment and mistakes. She even answered to Mr Myers questions on re-examination "Because despite what is going on, you have to find some kind of quality of life."
In his closing arguments NJ said -
"However, prosecutor Nick Johnson KC told Manchester Crown Court yesterday that the note should be viewed as a ‘confession’.
He said it was not, as she claimed, ‘the anguished outpourings of a woman in fear and despair’ at having been moved away from the frontline nursing job she loved.
It should be taken ‘literally’, he told jurors."
Lucy Letby's chilling note should be taken 'literally', court hears
"He says the point is very simple for the notes overall - the notes contain admissions,"...
Recap: Lucy Letby trial, June 22 - prosecution closing speech
I think he didn't get into analysis of the wording of the note, ie. "I killed them on purpose", as BM did with her, because NJ is avoiding an appeal issue (if convicted) that the note could have different interpretations, was therefore prejudicial and should have been excluded and the prosecution relied on the note as a substantial piece of evidence, and instead he wants the jury to focus their deliberations on what the evidence over the whole year shows. It also takes the wind out of the sails of BM before he's even left port, because he can't now say that the prosecution were over-focused on what she wrote because they need to shore up their case.
The note seems to have been a fairly large part of BM's opening remarks, in terms of his perceived need to downplay it's significance, when in reality it seems to have only been no more than a brief reveal at the end of the prosecution's four-day opening:-
11:39am
"On another piece of paper, she wrote: 'I don’t deserve to live. I killed them on purpose because I’m not good enough”.
“'I am a horrible evil person' and in capital letters, 'I AM EVIL I DID THIS'.
"That, in a nutshell," Mr Johnson tells the court, "is your case."
11:40am
That is the conclusion of the prosecution opening."
Lucy Letby trial recap: Prosecution finishes outlining case, defence gives statement
JMO