From my reading of this
Option 1
Club/Group Applies for a DMR ID in the normal way. https://register.ham-digital.org/
It is 100% down to them if they issue your Club/Group with a ID number.
When you get your ID number, you use that as the Club/Group Talk Group.
via
https://wiki.brandmeister.network/index.php/United_Kingdom
There might need to be a tiny bit of formal structure around having a "club".
@M0YNG The changes have been concocted on a Telegram group where 'UK Admins' gather. There is a bit in the PDF that encourages change to the new groiups but not mandatory yet. I suggest that if you want to keep it then advertise the group somewhere on the web and hopefully get some activity.
@M0YNG @g0dub Isn't Feditalk just a named TG at this point anyway? I have to admit that the Brandmeister's architecture isn't as nicely documented as I'd wish, so there is a lot of guessing on my part.