Out of curiosity, why can't anyone register as a new user on BS01? When I tried to, it says that the action is restricted to administrators. I have been reading over a few things in the wiki, and have found some possible errors I'd like to discuss in one of the talk pages or possibly fix myself.
Or you can make an account via HS01, then use those login details to get on BS01. BS01 just tends to be the more frequent target of vandals and spambots, so registration has been down there for a long time.