Chris Poolman works collaboratively as BAZ (with Nick Westbrook), Poolman & Rowe (with Elizabeth Rowe) and chris+keir (with Keir Williams). He also used to work with Robert Grose. And occasionally he works on his own too.
Other (similar looking) websites relating to these collaborations contain more extensive documentation.
www.bazbazbaz.com
www.poolmanrowe.com
www.balsallheathbiennale.com