IANAL, but off the top of my head reasons why this is utterly insane include:
They have stated as fact in the tribunal things that the investigation hasn't actually concluded yet.
They are including in the investigation hearing things that have been shown in the tribunal to be at best enormously exaggerated - and quite possibly entirely fabricated.
When the issue being investigated is a man in the women's changing room, you have to allow the person being investigated to say in her evidence that there's a man in the women's changing room.
The previous point has just been confirmed by a tribunal judge.
And they have to somehow hold this hearing without anyone involved discussing any part of the tribunal case or evidence.
I'm sure there's more, but most of my brain is currently too busy going 'what the actual fuck?!' to think it through properly.