Atmospheric phenomena in the city

I noticed a beautiful 360 degree circumzenithal arc when I managed to escape from my building for a few minutes after the lunchtime meeting (at which I only fell asleep the last 5 minutes instead of through all of it).

I didn't quite manage to get it all in on my compact but amazingly it was still there when I left, accompanied by sundogs. I snapped this on the way home.

*Edit - turns out the 360 circle is known as a 22 degree halo. I have changed this a couple of times but it is quite hard to work out from descriptions what I am actually seeing!