Fog lights
The Highway Code states that headlights must be used when visibility is less than 100 metres – roughly the length of a football pitch. Those needing to travel are advised to take extra care and ensure their lights (particularly fog lights) are in good working order before setting off. Drivers should also carry a mobile phone with a fully-charged battery and car adaptor if available (together with contact numbers if not already stored on the phone), and should ensure that their fuel tank is full, as using lights and heating can use a lot more fuel than usual.