A plain-language guide to UK lighting requirements for commercial vehicle operators and bodybuilders.
Commercial vehicle lighting compliance in the UK is governed primarily by the Road Vehicles Lighting Regulations 1989 (RVLR), as amended, alongside UNECE Regulation 48 (R48) which sets harmonised installation requirements for lights and reflectors. Together these regulations determine which lights must be fitted, where they must be positioned, when they must be used, and what conspicuity markings are required based on vehicle weight and size.
This guide provides an overview of the key requirements relevant to commercial vehicles and vans operated on UK roads. It is intended as a practical reference and is not a substitute for the full legislative text contained in the RVLR or the relevant UNECE Regulations.
The Core Regulatory Framework
Road Vehicles Lighting Regulations 1989 (RVLR)
The RVLR is the primary piece of UK domestic legislation governing vehicle lighting. It sets out which lamps, reflectors, and rear markings are obligatory for motor vehicles with three or more wheels, and specifies the conditions under which lights must be used. The regulations apply to all vehicles used on public roads in Great Britain and have been amended several times since 1989, most recently in 2018 to align with updated periodic roadworthiness testing requirements.
UNECE Regulation 48 (R48)
R48 is the international standard for the installation of lighting and light-signalling devices on motor vehicles. It is broadly equivalent to the RVLR, and the UK cannot refuse registration of vehicles approved to R48 on the grounds of lighting. Amendments to R48 have progressively mandated conspicuity markings on new HGVs and trailers.
DVSA Enforcement
The Driver and Vehicle Standards Agency (DVSA) enforces lighting compliance through roadside checks and the annual HGV test. Vehicles found to be non-compliant can be prohibited from use. Since 2012, DVSA examiners have checked conspicuity markings as part of the annual HGV test.
Mandatory Lighting: What Must Be Fitted
All commercial vehicles used on public roads must be fitted with the following obligatory lamps and devices as required under Regulation 18 of the RVLR:
| Light Type | Requirement |
| Front position lamps | Mandatory |
| Rear position lamps | Mandatory |
| Stop lamps | Mandatory |
| Direction indicators (front and rear) | Mandatory |
| Rear fog lamp | Mandatory |
| Rear reflectors | Mandatory |
| Headlamps | Mandatory for use in darkness |
| Reversing lamp | Mandatory on vehicles first used from a specified date |
Specific exceptions apply in certain circumstances – for example, vehicles first used before 1 April 1986 are subject to different requirements for some lamp types. Refer to the RVLR for the full schedule of exceptions.
Marker Lights
Marker lights are required on larger commercial vehicles to make them visible to other road users, particularly at night and in poor weather. Side marker lights and end outline marker lights help indicate the width and length of a vehicle. The requirement to fit marker lights and the specific positioning rules depend on vehicle dimensions and weight. Consult the RVLR and UNECE R48 for the applicable thresholds for your vehicle type.
Rear Marker Plates
Goods vehicles with a gross vehicle weight exceeding 7.5 tonnes are required to be fitted with retro-reflective rear marker plates approved to UNECE Regulation 70 (Regulation 70.00 or 70.01). These plates are fitted in addition to rear lights and reflectors. Their purpose is to make the vehicle conspicuous to drivers approaching from behind, particularly when the vehicle is slow-moving or stationary.
Rear marker plates typically feature yellow and red retro-reflective material. Note that white reflective markings are not permitted on the rear of vehicles.
Conspicuity Markings
Conspicuity markings are retro-reflective strips applied to the sides and rear of large vehicles to illuminate their outline at night using the reflected headlights of following vehicles. They are distinct from rear marker plates, though the two can be used together.
Which vehicles must have conspicuity markings?
Goods vehicles and trailers with a gross vehicle weight exceeding 7.5 tonnes and a length exceeding 6 metres are required to have conspicuity markings. This requirement applies to new vehicles first registered from 10 July 2011. There is no requirement to retrofit markings to vehicles registered before that date, though operators may choose to do so.
Colour requirements
Side markings must be amber or white. Rear markings must be red or yellow. White reflective markings are not permitted on the rear of a vehicle.
Coverage requirement
Side markings must achieve at least 80% cumulative coverage of the vehicle’s length. There are specific rules governing gaps in the markings and the positioning of the front and rear ends of the tape relative to the vehicle extremities.
Material standard
Conspicuity marking tape must meet UNECE Regulation 104 (R104), which specifies retroreflectivity levels, permitted colours, and minimum tape width (typically 50mm). Compliant tape carries an E-mark and a homologation number. Tape meeting R104 lasts considerably longer than non-approved alternatives and performs significantly better in adverse conditions.
Vehicles under 3.5 tonnes
Vans and light commercial vehicles under 3.5 tonnes are not subject to the mandatory conspicuity marking requirement. However, fitting approved markings voluntarily improves visibility and is considered good practice, particularly for vehicles operating at night or in low-visibility conditions.
Strobe and Warning Beacons
Amber flashing beacons may be used on certain categories of commercial vehicle where there is a legitimate operational need, such as vehicles working on or near the highway. The use of coloured warning beacons is tightly controlled under the RVLR. Blue beacons are restricted to emergency vehicles as defined under the regulations. Operators should confirm their specific entitlement to use warning beacons before fitting them.
Interior and Step Lighting
Interior lighting and step lighting are not subject to mandatory fitting requirements under the RVLR in the same way as exterior lights, but they contribute to safe vehicle operation and are a recognised element of overall vehicle safety. Step lights in particular improve safety during entry and exit in low-light conditions, reducing the risk of slips and falls for both drivers and passengers.
Key Responsibilities for Operators and Bodybuilders
Operators are responsible for ensuring their vehicles are maintained in a condition that complies with lighting regulations at all times. A lighting defect identified during a DVSA roadside check or annual test can result in vehicle prohibition, a fixed penalty, or an adverse outcome on the operator’s licence record.
Bodybuilders fitting or modifying commercial vehicle bodywork must ensure that any modifications do not obstruct mandatory lamps or reflectors, and that the completed vehicle meets the lighting requirements applicable to its weight and dimensions. Where a vehicle is subject to EC Whole Vehicle Type Approval, the application and conformity of conspicuity marking requirements is determined as part of the approval process with the Vehicle Certification Agency (VCA).
Quick Reference Summary
| Vehicle Type | Key Requirements |
| All commercial vehicles on public roads | Front/rear position lamps, stop lamps, indicators, rear fog lamp, rear reflectors |
| Goods vehicles over 7.5 tonnes | Rear marker plates to UNECE Regulation 70 |
| Goods vehicles over 7.5 tonnes and over 6m length | Conspicuity markings to UNECE Regulation 104 |
| All conspicuity marking tape | E-marked, R104 compliant, minimum 50mm width |
| Side marking colour | Amber or white |
| Rear marking colour | Red or yellow (not white) |
| Side marking coverage | Minimum 80% of vehicle length |
Further Information
The full text of the Road Vehicles Lighting Regulations 1989 and all subsequent amendments is available at legislation.gov.uk. Guidance on conspicuity marking requirements for goods vehicles is published by the Department for Transport at gov.uk.
For questions about the lighting products available from Stedall, contact the team on 01454 319524 or at sales@stedall.co.uk.
Important note: This guide is intended as a general reference only. Lighting regulations are subject to amendment and the specific requirements applicable to your vehicle depend on its weight, dimensions, date of first registration, and type approval status. Always verify current requirements against the legislation or seek advice from a qualified compliance specialist before making changes to your vehicle’s lighting configuration.