Fog lifting

You might wish to use the magnifying glass on this one to see it LARGE.

Very thick fog this morning, and on the way back from a customer appointment, it lifted before my eyes. I was 3 minutes from home in the middle of our housing development where we have a Morrison's supermarket. I parked up and ran round the back of Morrison's where there is one of our few areas of open space left in the town. (Almost passes for the countryside!) I know there are some cloud appreciation Blippers out there, so perhaps you can tell me what this cloud formation is called?

I couldn't decide whether to stick to colour or go black and white. The black and white is using Fine Art treatment in Silver Efex. You can see the colour version here.