2011-03-05 08:08:25 +0100  Allowing logins
2011-03-05 08:08:25 +0100  Power is back. UPS running on mains.
2011-03-05 08:08:25 +0100  Mains returned. No longer on UPS batteries.
2011-03-05 07:17:04 +0100  Users requested to logoff.
2011-03-05 07:12:03 +0100  Running on UPS batteries.
2011-03-05 07:11:58 +0100  User logins prohibited
2011-03-05 07:11:57 +0100  Power failure.