Bicycle lightingUnited Kingdom
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170. Bicycle lighting
Bicycle lighting refers to lights and reflectors fitted to a bicycle to help the rider see and be seen, especially in darkness or reduced visibility. Required equipment and the circumstances in which bicycle lights must be used vary by country, so riders should follow the applicable local rules.
Wikimedia.org • Santeri Viinamäki • CC BY-SA
What lights must a bicycle display at night in Britain?
A bicycle must have a white front light and red rear light illuminated at night, plus legally required reflectors. Flashing lights may be allowed under the lighting rules; ensure the equipment is visible and compliant.
🔗 gov.uk • Highway Code for Great Britain, Annex1 — bicycle lighting and recommended bell

Traffic rules
United Kingdom