Telegraph today: "A senior judge has ordered Wikipedia, the online encyclopedia, to disclose the identity of one of its contributors after a mother and her young child pleaded for help in identifying an alleged blackmailer."
http://www.telegraph.co.uk/technology/wikipedia/6710237/Wikipedia- ordered-by-judge-to-break-confidentiality-of-contributor.html
It's also in "This Is London":
http://www.thisislondon.co.uk/standard/article-23778384-wikipedia- told-to-help-track-blackmailer.do
Mike