This is the text I got from power networks Update at 21:02 - Engineers are on their way and are expected to arrive by 22:00. At this point we think the issue is a fault with some equipment in your local substation on Friern Road. Until an engineer arrives on site, it's difficult to give a time of restoration. However our estimation for this type of power cut in your area is 3 hours, so we're looking at 23:30 to have you back on. Hope this helps