Thanks for that Derek

Bit sparse best thing I can see is the Newsgroup program called Netscan
http://netscan.research.microsoft.com/ May be worth including on your
Usenet, Forums, & Lists section? Which has only 4 items so far
I did see an European Bulletin Board Archive List a few years ago (not UK) and it had most of the postings of a UseNet type list which was Usenets
main rival (name escapes me

) could be on the Wikipaedia pages somewhere?
definitely wasn't Deja News that was half of the Usenet brought by Google and Fidonet was swamped out of existence by Usenet groups
I have an old site list (hand written) dating back to the first time I ventured onto the Web 1998? ...I discovered how favorites where organised afterwards
I was that green!! 
I compiled it out of just about every book with site listings in the local library!

I did find it the site was
http://www.clari.net but..
It closed in April 2005 homepage is still open but is only a museum piece

Still have to track down that European Archive of Usenet Clari.net and other sites postings that may have gone too?
Fidonet is still running!
http://www.fidonet.org/ Navigation on the pages is not easy So I cannot tell you how up to date the site is

And clicking on links gives you a prompt for a download (Avoid!!)Better off finding an archived posting site(if such a site exists?)
My advice stick to Google Groups

Or ask the gang here to do a search?