https://thecritic.co.uk/it-isnt-easy-being-a-gender-critical-green/
'The Deputy Leader of the Green Party Zack Polanski also thinks people with gender critical views aren’t welcome in the party. He’s made it clear that “those members who claim that trans women are men and trans men are women – should not have a place in the Greens.”'
Quoting this interview from earlier this year:
https://leftfootforward.org/2023/03/zack-polanski-interview-transphobia-is-not-welcome-in-the-green-party/
'... he says that the small number of members who take a contrary view to the party’s policies on trans rights – specifically those members who claim that trans women are men and trans men are women – should not have a place in the Greens. He says: “I’m really clear that if you want to misgender someone then that is transphobic and transphobia is not welcome in the Green Party.”'
sounds like potential discrimination, to me.
I'd also add that saying a 'small number' of members are 'gender critical' is a deliberate distortion.