Wandering around on the Web, I found a 'Dictionary of British (or English?) Slang'. Noting a couple of omissions, I tried to post them, but while they were accepted, I was informed that they would be checked before they would be included. Wikipedia should do the same.

Regarding legal action; newspapers and other large media organisations retain high-priced lawyers. (Why not, it's pre-tax)   Unless you have a high-priced lawyer of your own, it might be better to accept what you'll get, which is likely to be a grudging 'apology' somewhere on page 9.