Thanks for this report! Would you be willing to open a task in phabricator about the bytemark mirror, and tag it with dumps-generation so that it gets into the right queue? https://phabricator.wikimedia.org/maniphest/task/edit/form/1/

You could update the Umeå University mirror information on the wiki page directly if you like: https://meta.wikimedia.org/wiki/Mirroring_Wikimedia_project_XML_dumps#Current_Mirrors