On a lorry, is the rear fog light compulsory?

Correct answer

Yes.

Yes, a lorry must be equipped with a rear fog light under Article 16.1 of the General Vehicle Regulations. Having it fitted does not mean keeping it on: use it only in especially adverse conditions such as thick fog, very heavy rain, heavy snowfall or dense dust or smoke. This equipment requirement does not extend to every vehicle type; for example, it is optional on a motorcycle.