This is good news, well done BASSAwitch for not being intimidated by the union bullies. I hope Bw reads through the posts here on this thread over the past few weeks, especially the links to relevant case law, which make it clear that the regulations do indeed apply to Branches:
http://www.pprune.org/passengers-slf...ml#post6277970
I think the complaint can be lodged online:
Certification Officer - Complaints
It might be as well to post the complaint here prior to sending it off, and maybe other posters might be able to ensure it "hits the mark" or make other relevant suggestions to help its wording.
It's still a good idea to copy both BASSA's and Unite's auditors as well as Unite itself in order to get things moving faster.
Bon courage!