This is probably a good moment to remind employees and contractors of Wikimedia UK that comments about individuals or organizations that appear defamatory, may be taken as a position of the charity, especially if the charity does not take any steps to disassociate itself from published statements.
Writing from personal email addresses does not automatically waive these issues, particularly considering the footers that are added to correspondence to this public list and that the use of apparently private email address are intermixed with emails from the charity's domain.
I suggest that Jon Davies as the Wikimedia UK CEO, takes a moment to review whether guidelines for employees and contractors with regard to publishing potentially defamatory statements are sufficient to protect the charity. He remains free to ignore my advice of course, and having raised this as a risk when a trustee, I have no doubt this is not seen as urgent.
Thanks, Fae