I don't think Hayton was 'out' as an AGP at that point. I wasn't aware of that at that point, and I had no idea he had a wife and children (I think I assumed he was gay). But he was known to be a man pretending to be a woman, as was Harrison, which should have been enough for them not to be invited as speakers (multiple times).
I just couldn't get my head round how a group could be formed which took the view that women are female and need single-sex spaces, and people can't change sex, and then invite males pretending to be women to speak at their meetings.
I watched the video of Harrison's performance at one of their meetings, and I could see just how thrilled he was to be speaking there. It was all about him and it was extremely uncomfortable to watch. I don't understand how they couldn't see this and kept inviting him and Hayton to speak.