Internet outage.

[nzoomed]

Our fibre was out for the best part of 24 hours.
Apparently it was a power outage at an exchange but I believe it was just Vodafone affected in our area.
Weird thing was it was fine during the storm and only went out some time last evening for us.

might have been running on batteries or generator for a time after power died

Quite possible, but there were no power outages in our area, im not sure exactly where the affected exchange was, I believe quite a large area of the north island was affected.