Dear KENET, Your mirrors ubuntu.mirror.ac.ke & debian.mirror.ac.ke have been unavailable for more than a week. Given that you are listed as Kenya's official mirror for debian and ubuntu, it's unacceptable to be down for this amount of time. It sucks that I have to reconfigure a bunch of boxes with a new upstream. PLEASE FIX THIS! If you can't keep the servers up, do not register as an official mirror!
From the ubuntu guidelines [1] -- Be committed to being a mirror. Obviously, each offer to be an Ubuntu mirror is great and users appreciate it. However, it's in nobody's interest to go and change the sources.list every time a mirror disappears. So if you're not planning on creating a mirror for the long run, don't register it. People might get disappointed in you and/or Ubuntu.
1. https://wiki.ubuntu.com/Mirrors#Mirror_Guidelines Sadly burdened, Mirror user.