I hadn't noticed before, but you can actually see the frost forming on the coach roofs in that shot!! They came out of the 'relatively warm' garage (about 5c or so I suppose) into the garden that was about -5, it certainly was as cold as it gets here. It was totally still as the sun came up, a very memorable morning. In fact it was still dark when I started!!
Don't often get mornings so still like that here, it's flat and windy on the part of Fraggle Rock we live in.