Surely the chapter is about the promotion of Wikimedia in the UK, raising awareness of our projects and supporting the wider projects of WMF. I don't see a link between SPs on Wikipedia (and or other projects) whose disruption is essentially behind a computer screen and who wish to engineer splits between editors by subtle and unsubtle tactics that can only work on collective projects.
*Sociétés or Limited Companies are bound up in legislation not policies and guidelines. The law, memorandum, constitution and resolutions* define what WMFUK2 is and I doubt that any SP is remotely interested in being involved.
As for giving my WMF usernames out, I certainly would be reluctant. I have had three, I have never been banned or blocked and don't think I have had a test-1 even. I have left en-wikipedia twice, once because a wp project "leader" accused me of fabricating a reference because I had hosted a phd thesis on my own "porn" site; The second time because I had unfortunately started afresh too soon after my RTL and carried some of the baggage and now much saner and wiser in a state of non-editing. There are no smoke and mirrors, I think that anybody with a an hour on their hands could probably check through the enwiki-l archives and find all of my past personas.
michael