As I've just explained: none of the orgs above were "Associate Members". They were all orgs that were permitted at the time to attend as guests. The rest were members of the public who were permitted at the time to attend as guests. That particular APPG on ME permitted members of the public to attend its meetings. You signed in at the door and your name and affiliations were recorded in the Minutes. In the summer of 2010, when Annette Brooke took over as Chair, the Office Holders had decided that from the autumn 2010 Parliamentary term, the group would no longer be open to members of the public attending. AfME and MEA have provided joint Secretariat services to these meetings and acted as Minute takers. But all non MPs and non Members of the House of Lords would have attended as guests, only. And they had no vote at meetings.