Used 3.5t Horseboxes for Sale in the UK

A 3.5 tonne horsebox and a 3.5 ton horsebox both refer to the same weight class vehicle, but the wording depends on country:

• Tonne (metric tonne) - used in the UK and Europe
• 1 tonne = 1,000 kg
• The correct term for horseboxes in the UK is usually 3.5 tonne
• Ton (imperial ton) - used mainly in the USA
• 1 ton = 907 kg
• Not generally used in UK vehicle classifications

Because horseboxes in the UK are regulated using metric measurements, a 3.5 tonne horsebox is the accurate term for listings, insurance, road tax, driving licence rules, and DVLA documentation.

Yes - if you passed your car driving test in the UK on or after 1 January 1997, you can legally drive a 3.5 tonne horsebox on a standard Category B licence. Anything over 3.5 tonnes generally requires a Category C1 or HGV licence. Always check the vehicle's Maximum Authorised Mass (MAM) on the logbook or VIN plate to ensure it doesn't exceed 3.5 tonnes once loaded.

For a deep dive into driving licence requirements, see our Horsebox Driving Licence Requirements in the UK blog post.

Before you buy a second hand or used 3.5 tonne horsebox, inspect the chassis and floor for rust or rot, check the ramp mechanism and horse area for safety and wear, verify the vehicle's paperwork (V5C, MOT history, service records), and take it for a test-drive to assess engine and mechanical condition.

For a detailed checklist, see our horsebox and trailer buyers guide..