So it turns out that I was at the house of the person who got the virus through community transmission in Auckland on Saturday night. She is a Virgin flight attendant and was on-call a week or so ago but never flew. She was in a room where they pick flight attendants for flights - someone there also turned out to be infected so transmission probably from him.
She is a friend who was in self isolation at another friends house. I went there not knowing she was in self-isolation! A bit annoyed at my other friend for not telling me before I came and only heard from her once I was there. We heard today she tested positive.
Anyway I never got closer to her than 7m (we talked opposite ends of the hallway) but I did use a bathroom she had used. I did wash my hands thoroughly, didn't use the hand towel and used my elbow to open door and turn off the light switch.
Not sure my risk but now I'm stuck at home with the family so hope I didn't get it to pass it on! No symptons yet.....