I don't know about the fog lamp - that hadn't occurred to me so will do some investigating. Reading about imports, everyone speaks of the need to sort the turn signals, but don;t mention the fog lamp. So maybe my truck never having one means it's not required. The laws here are a weird mess.
Here's an article on the subject.....
Rear Fog Lights
While not common in the U.S., rear fog lights are mandatory in Europe. Typically, the rear fog light is a bright red light that is the same brightness as your brake lights. The job of the rear fog lamp is to reveal the position of your vehicle when driving in the fog, snow or other conditions that limit visibility. Your normal taillights are fairly dim, so they are not as likely be seen in foggy weather. Rear fog lights are often placed on the left side of the vehicle. This lets other drivers know approximately where the vehicle is located in a travel lane. Some newer models, however, have rear fog lights on both sides to further improve visibility. Like the fog lights on the front of your car help make you more visible to oncoming traffic, rear fog lights make you more visible to people behind you. There are several types of rear fog lights. Some take xenon or halogen headlight bulbs, but other rear fog lamps are made up of LED lights. LED lights are bright, long lasting and common on newer vehicles with rear lamps.
The last time I was over in Germany I was on the autobahn driving at night with what I thought were just the front fog lights on, didn't realize that the fog lamp switch had 2 positions, pos 1 turned on the fronts while pos 2 (pull the switch outward) turned on the rears. A few flashing lights coming up behind me & a Deutsche Bundespolizei pulling me over set me straight on the matter.
*I didn't know*...
Like driving in the city of London........it's illegal to drive in the city streets at night with ones headlights on, the streets are so well lit the main headlights don't need to be on & if one does so one will get a ticket from the *coppers*