I can’t believe it’s called Mainstream. So lame. Anyway, website’s here if you want more info:
https://www.mainstreamlabour.org/
You can become a member but it ain’t free.
The article suggests it’s going to organise for the Deputy Leadership election. If so it’s a bit late given nominations close on Thursday. Anyway, I for one welcome our soft gooey lefty overlords.
Most members and forums have a pretty clear view on the subject.
It is that view that leads to desperate terfs etc posting publically. As they are getting banned from most groups.