Well this isn't dumps generation, strictly speaking, but anyways...
A user reported on the xlmldatadumps-l mailing list that the bytemark mirror is out of date. Upon closer inspection, it turns out that the index.html file has not been updated, though the dumps themselves have been pulled regularly.
The maintainer of the mirror has been pulling from your.org, a fine idea. But the index.html file is perhaps not included in the rsync.
I note that the rsync file lists are synced to our mirrors, so that e.g. https://dumps.wikimedia.your.org/rsync-filelist-last-2-good.txt is available and current. It lists both backup-index.html and backup-index-sorted.html which should be helpful. Actually, picking up current copies of ll *html files in the list would be good, since it's possible that our list of mirrors, our legal notice and so on might be updated from time to time.