Today there was a protracted outage of the forums and website.
This was caused in the first instance by some missing OS files, which required a full OS check and refresh. As a follow on consequence of this numerous software sub-systems in the back end of the system had to be upgraded to later versions. This then cascaded in a need to upgrade the Forum software itself, as it was no longer compatible with the current support software versions.
Anyway comeuppance of it all is that after spending the entire afternoon/evening of chasing down errors and fixing them, it's now back up and running correctly.
There may be further repercussions as the Forum updates may not be compatible with some of the 'tweaks' that have been performed on the forum in the past. If a non-standard add-on or feature is broken, the likelihood is that it is most unlikely to be fixable.