This trial is unlike other murder trials, where the prosecution's work is to convince the jury who did it.
If the jury accepts the seven deaths were murders, there is only one contender. (IMO)
The verdicts as regards the alleged murders rely on the jury accepting the experts' opinions that the deaths can't be explained by natural disease (and were the result of deliberate harm), further endorsed by the treating doctors and other colleagues who said the deaths were unexpected. There are no alternative expert opinions for them to consider. They may of course decide the alleged acts of deliberate harm were without intent to cause really serious injury or death.
I went through the nursing spreadsheet looking at the deaths only, to see how many other staff were on duty. I also added the two insulin poisonings, since it is accepted that insulin would not be added accidentally, to increase the exposure.
The results are that the maximum number of incidents any other nurse was present for out of the nine (7 deaths + 2 poisonings) was four, followed by five nurses being present for three.
Mel T - 4 (A, C, I, O)
Belinda S - 3 (E, F, L)
Christopher B - 3 (I, O, P)
Elizabeth M - 3 (A, C, D)
Mary G - 3 (A, L, P)
Valerie T - 3 (E, F, I)
The way I view it, if the jury decides guilt on the murders, or just one murder, the case falls like dominoes. If they don't decide guilt on the murders, the attempted murders fall away.
JMO