From a photographer's point of view this is like being let loose in paradise. The local wildlife probably feel very different about it. It's been a good breeding year for many - for example, this buzzard is one of a family which normally produces a single offspring, while this year they have two - and this sudden cold puts a heavy pressure on food supplies. It's particularly good that the Diary is getting reports of more wild cats on this end of Ardnamurchan than we've seen in several years.
There's pressure on the human population too. The roads have been lethal at times - this picture shows the road near Ben Hiant croft, with the surface formed from a layer of rain, which froze, followed by a hailstorm which, in its turn, was covered in white frost. And, with the temperature hardly rising above zero all day, there's little thaw. One of the worst locations has been the Kilchoan-Sonachan-Portuairk road, where the Diary knows of three people who lost control on Saturday, one ending up in the ditch.