Useful guidance, traceable sources.

Original writing and primary sources

We write original guides and link to the manufacturer, government and police sources that support them. Archived sites inform the historical subject of this domain; their articles, photographs, customer reviews and commercial claims are not republished as ours.

Sources for the initial guides were checked on 3 October 2026. The review date describes our source review, rather than a test or certification of a product.

Vehicle-specific advice

General guides help with planning and comparison. Exact capacity, mounting locations, fittings, torque settings and installation procedures belong to the vehicle handbook and the instructions for the specific equipment.

DVSA guidance cited here applies to England, Scotland and Wales. Check the relevant local rules separately for Northern Ireland and other jurisdictions.

Commercial relationships

The initial guides have no paid product placements or affiliate links. Manufacturer examples do not imply affiliation, dealership or endorsement. Any future commercial relationship will be identified alongside the relevant content.

Keeping information current

Manufacturers change ranges and fitting requirements, and official guidance can be updated. We retain source links so readers can check current information before making a purchase or using equipment.