Gary, I think Mike might have a valid point here, because I have just realised that when you open up this site, and BEFORE you log in, the 'N' forum is missing. With Mike not being a registered user, then he won't see the forum.
Once you log-in, the 'N' forum appears under HO/OO where it should be. Might be a bit of a bug in the program somewhere. Just thought I'd let you know.
Paul