I'd like to start a British English team.
Bruce Cowan (bruce89) <email@example.com)
There is no Website or mailing list.
(How do I join?)
I'm not entirely sure, but http://docs.fedoraproject.org/translation-quick-start-guide/en_US/ may say something.
Yes, Translation Quick Start Guide explains how to join a team. You've created British English team, so this bug report is unnecessary. Of course everyone is welcome to provide translations.