Long story short. A divergent light fogbow with the secondary supernumeraries. A very rare catch. You can read all about it at Les Cowley's Atoptics OPOD site.
Unfortunately the fog got me by surprise and I left at home hurry with a battery half charged and forgot the spare one in garage. Due to the battery fail I managed to shoot only a handful of images of which the best are shown here.
In the car's headlights, quite mediocre but probably the best I have seen jet.
This is where I photographed the fogbows.
Some random shot while driving in fog.