We are currently putting together a diagram that sets out the roles of different actors in the Wikimedia community, including the Foundation, the community and the chapters. We're planning to use this diagram to help explain the relationships to the Charity Commission and help us gain their support.
I've attached the latest draft - please let me know if you have any comments on it.
Many thanks,
Andrew Turvey Chair, Wikimedia UK
wikimediauk-l@lists.wikimedia.org