Hayton is a confessed AGP. They are quite upfront and open about it.
This is the PubMed.gov definition.
Autogynephilia is defined as a male's propensity to be sexually aroused by the thought of himself as a female. It is the paraphilia that is theorized to underlie transvestism and some forms of male-to-female (MtF) transsexualism.
AGP directly negatively affects women.
Hayton co wrote the trade union guidelines that meant men identifying as women could use female facilities, and also the policy resulting in school children calling them Miss.
Also, speaking at a WPUK meeting, Hayton made a joke about having used the female facilities (I can't remember the exact details). At an actual meeting being held to advocate sex segregated spaces!
In the distant past, I considered whether it might be good strategy to hear from transwomen who seem to support women. Including when it looks like a change of heart.
Being able to say look, even this transwoman agrees with us!
But I quickly came to the conclusion that I was wrong. And many women, before me, found this out.
Apart from anything else, I asked myself whether I needed a male, at all, to analyse my (gender critical) feminism for me. Especially one who has been part of the root cause of the issue in the first place.
Hayton has been asked, many times, on this forum alone, to say whether they now disagree with the guidelines they wrote and has refused to answer.
I don't know about anyone else, but to me it obviously means they still agree, but don't want to have to say so.
Which is shit.