UK Trailer Lighting Law: What You Need to Know
Towing a trailer on UK roads? It’s essential to ensure your lighting setup is fully compliant with The Road Vehicles Lighting Regulations 1989. Here’s a breakdown of what the law requires:
Mandatory Lighting (all trailers):
- Two red sidelights
- Two red stop lights
- Two red triangular reflectors
- Illuminated number plate
- Amber indicators, flashing at 60–120 times per minute
- An alert system for the driver (e.g., dashboard light or buzzer) signalling that the indicators are working properly
Additional Requirements by Size and Age:
- Built after 30 Sept 1990: Must include white front reflectors,
- Trailers wider than 1.3m: At least one red fog lamp; if only one, fit it either centrally or on the offside
- Wider than 1.6m: Requires white front position lights or markers
- Trailers with brakes and built after October 2012: Must have a reverse light
- Longer than 6m (excluding drawbar): Must include side marker lights (red or white)
Exact Placement Rules:
- Indicators: 350–1500 mm from ground; max 400 mm from side; at least 400 mm between them
- Reflective triangles: 250–900 mm from ground; separated by at least 600 mm; no more than 400 mm from sides
- Fog lamps: 250–1000 mm from ground; separated by at least 400 mm; at least 100 mm away from tail/indicator lights
Braked trailers over 750 kg should have a reverse lamp on the left, or one on each side if over 6 m long.
Why This Matters
- Legal Compliance: Failing to meet these requirements can lead to fines or UK law enforcement issues.
- Road Safety: Correct lights and placements ensure visibility and clear signalling to other road users.
- Insurance Risk: Non-compliant lighting setups may void your insurance, especially in the event of an accident. The Sun.
Recent news highlights that mismatched number plates (between towing vehicle and trailer) can result in a £1,000 fine and major insurance issues The Sun.
Summary Table
| Trailer Spec | Required Lighting & Markers |
|---|---|
| All trailers | Sidelights, stop lights, reflectors, number plate, indicators |
| After 30 Sept 1990 | Front reflectors |
| >1.3 m wide | At least one fog lamp |
| >1.6 m wide | Front position lights |
| Braked & post-Oct 2012 | Reverse light |
| >6 m long | Side markers (red/white) |
Please be aware, this article is for guidance only and is not intended to be a fully legally reliable document.
Keep on Towing
Ultimate Towbars
