Has the cleaner unplugged the telephone server to use the vacuum cleaner.Just in case anyone is trying to contact the Towers all of there booking lines are down with a recorded message saying "due to unforeseen circumstances etc etc"
Or the exact opposite and they updated overnight and it screwed up the system.forgot to update but they are back up and running..
Next it will be aliens stole your bog roll.Russian / Chinese / North Korean hackers if you ask me.