I am not sure how many are in the loop of things but of late many games have been having issues with servers, which include WoW and GW2 not just UO. Seems that hackers have been attacking the cloud servers in the past couple of weeks. This has caused issues with GW2 servers that I personally know of and some WoW servers has had the same issues.
Now this may be a UO issue only related to UO but to much of a coincidence that other games are having similar issues at the same time.