I think that this started at the Green Party Conference, when the police were called to disperse (yeah, I know) the women handing out Fairplay for Women leaflets. This was the same conference where Baroness Jenny Jones had her crowdfunding appeal stall vandalised with the words 'terf'.
Sian Berry, one of the joint leaders, added her voice to the TRAs to persuade security and police that the women were creating an unsafe environment. Shahrar Ali made his feelings known - that Berry's intervention was inflammatory and emboldened TRAs who were behaving disgacefully. He was targeted by TRAs with verbal abuse and insults, followed by official complaints of transphobia.
It looks to me as though he is being denied 'due process': he is not being given information about the substance of the complaints against him. He is in limbo and under a cloud because of the complaints, but the party seems slow to progress matters.
Shahrar Ali is pointing to a wider issue with the Green Party: the role of Chief Executives, Chairs of the Executive Committee, local parties and party leaders in encouraging TRAs, overlooking the need for due process and finding people guilty of summarily. He is highly critical of the party's immediate and continuing response to the Challenor affair.
Incidentally, top TRA Sian Berry is to be the Green Candidate for London Mayor. Just saying...... 