I wrote a summary before seeing your informative posts minou123 but I'll post what I wrote in any case:
Karen McEwan, another witness talking about the top of the Post Office being in chaos only a short while back. (I've heard nothing to suggest it's improved markedly since then.)
McEwan had a negative impression of Staunton. She and others didn't like his behaviour. (Note that she isn't the person who made the Employment Tribunal complaint that mentioned Staunton, that was Jane Davies. I think McEwan is Davies' successor.) She added substance to the allegations that Staunton had tried to close down the investigation related to Davies' complaint. While he was doing this, Post Office top people thought the complaint was only about Nick Read, and Staunton didn't set them right on this mistaken assumption, but they learned that it also related to Staunton when they received particulars of Davie's claim from the Employment Tribunal. She views Staunton's interventions as being self-serving.
She made clear that as Chief People Officer, she was responsible for employees, which did not include subpostmasters. This didn't come across as evasive but was more about recognising the reality. But this has had an impact on trying to tackle the mess(es). For example, the interface between the Retail Function and the subpostmasters was failing. In her view, that was down to the people involved on the Post Office side. She had to have her arm twisted to give a name and eventually identified Martin Roberts, Chief Retail Officer. He's (sort of?) been replaced.
She does come across as a professional person, and not one of those who were keen on playing games. But she's in post and is toeing the party line. She's reasonably direct but at times lapses into HR speak, and some of the documents she's produced are remarkable in their lack of clarity.