I have been accessing uk.d-i-y through the Google archive since I discovered it about 2 years ago.
You can see a simple list of postings; a tree list of the threads within a topic was shown at the side & you could select the ones of interest & view (ie download) only those. Posting a new topic was simple, as was responding to a thread within a topic by simply clicking on "Post a follow-up to this message" at the end of a posting.
Now it appears to have gone haywire. An attempt to post a follow-up brings a message like "Unable to retrieve message snipped-for-privacy@individual.net".
If I revert to my old newsreader it means I have to download the whole set of postings (no braodband here :-(( ).
The problem appears to be associated with 'new google groups' which doesn't seem to be able to handle things in thread-hierarchical order. Anyone any solution please?