I've been wondering whether I'd have any luck talking folks around here to Broom Brigade for our festivities. I think it could be fun.
I don't think I remember seeing anything about BB anywhere other than the US (and I didn't notice it until your UK/Sweeps idea, VTam) I guess that makes up for us not having the same kind of Sensible Clothing Groups (forgot the name, dang it) in the 20's..I can't remember what the US version was called and I think it was mostly interested in shedding miserable, restrictive undergarments.

While this thread is up, I'll add Bettynh's link from Linda Allen's CD thread. It's a batch of articles/mentions that somebody collected and put together:
YesterYear