Update: Server problems on 23rd June 2006
The official response for the problem experienced on the 23rd June (we're guessing that someone got seriously shouted at!):-

TYPE:

Three unplanned power outages

FACILITY:

TelecityRedbus Sovereign House
227 Marsh Wall
LONDON
E14 9SD

BETWEEN:

23/06/2006 08:59:00 GMT

AND:

23/06/2006 09:11:00 GMT

REASON FOR OUTAGE:

A communications failure during testing of the UPS systems supplying the
north side of the TelecityRedbus Sovereign House facility, compounded by
a general failure on one of the three redundant UPS systems prevented
the two remaining UPS systems from synchronizing with the utility mains
power supply. In order to prevent damage to the UPS systems and LV
distribution network, the two UPS systems went in to bypass mode.

IMPACT:

Three instances of brief power-loss of around 1 to 2 seconds each,
causing most servers to reboot.