You must demonstrate to your instructor how to turn on your rear fog lights in the UK Driving Theory Test before describing when to use them.
This is how it works:
Dipped headlights: are utilized in foggy weather since full beams will illuminate the fog in front of you, further reducing your vision. Either a control panel or a control arm positioned on the steering wheel typically houses the headlamp controls. They will be simple to spot because they always utilize symbols that resemble light bulbs and light beams.
Turn on the rear fog lights: The center console of the majority of European automobiles has a dedicated rear fog light button. Once more, it ought to be simple to recognize. The majority of rear fog light buttons have a graphic of a on headlight with a wavy line through the beams signifying fog.