Thanks everyone. I am glad I do not work for an oaf like the one you did Linn. As it happened, I had already had a near miss in the morning yesterday. I was coming to the end of a street, doing about fifteen to twenty, when another car took the corner too fast and skidded across on to my side of the road. We both stopped a centimetre or two off a crash. I only had to round the next corner and park outside my house. However, my left foot was shaking so much, that I pulled into the first open space, because I could not be confident of controlling the clutch enough to manouevre properly. The road where the crash did occur was free of snow apart from the very middle.
I will be going to the doctor for a check up in the morning. I usually have tension in my neck and shoulders anyway - especially when I have not been training properly. A recent ligament injury - the third on the same foot in two and a half years - has stopped that for the time being. So it would be a bit hasty to attribute any tension in my neck to whiplash. Still, I am bearing in mind that there are folks up and down the country this weekend who are also getting news of traffic accidents - and many of them would have been getting worse news than us. I reckon snow is best kept for Christmas cards and polar bears!