The Plusnet Webspace
Setup Guides were written a couple of years ago & refer to using an HTML editor called Nvu.
Development of Mvu ceased some time ago & there is no longer anything useful to be found via the links to the Nvu site. There is an HTML editor called
Komposer which takes over where Nvu left off. Although Komposer has been developed beyond the version of Nvu used in the screenshots on the help pages, I suspect that the information is still useful to a new Komposer user. I've never used either, so I'm not best qualified to judge.
While it may not justify Plusnet's staff time to re-do the relevant pages in their entirety, updating the links to point to Komposer & a brief note of explanation could well be worth the effort.
If nothing else, having a Webspace tutorial that demonstrates so well what happens if you don't review your links on a regular basis could be considered a double edged benefit to Plusnet's professional standing.