I`m sure you know it is "beyond reasonable doubt" for a conviction.
The prosecution has to convince the jury that there is no other reasonable explanation that can come from the evidence presented, the jury must be
virtually certain of the defendant’s guilt in order to decide a guilty verdict.
Having sat in a jury room several times in every case there has been a "what if?" discussion but the decision was made on the weight of evidence provided.
In the Letby case there is a suggestion that some of that evidence might be flawed which is enough doubt for her to be serving a WLT.
Would be the same when I restore the DP.
Save the ultimate punishment for the most extreme cases where there is zero doubt.