Trailer Number Plates (Road Legal, Custom & Built to Last UK)
Upgrade your trailer or caravan with our trailer number plates, designed to deliver a clean, durable finish while remaining fully compliant with UK road regulations.
At PlateBoss, we manufacture all plates in-house using high-quality materials, ensuring every trailer number plate meets DVLA and BS AU 145e standards. Whether you’re towing a caravan, box trailer, car transporter, or horsebox, our plates are built to stay legible, durable and fully legal.
Why Choose Our Trailer Number Plates?
✔ Fully road legal (DVLA & BS AU 145e compliant)
✔ Precision-cut for a clean, accurate finish
✔ Durable, weather-resistant materials
✔ Produced to match your tow vehicle’s exact registration
✔ Same-day dispatch and collection options
👉 Built to stay legible and secure, whatever you’re towing.
Custom Trailer Plates – Built Around What You Tow
We produce trailer number plates suited to different loads:
Caravans – full-size plate for the rear of the van
Box trailers & utility trailers – standard rear plate
Car transporters & trailers that block your car’s own plate – a legal must
Horseboxes & plant trailers – durable, weather-resistant build
All plates are manufactured to meet legal spacing, font, and margin requirements.
Do You Legally Need a Trailer Number Plate?
A trailer, caravan or anything you’re towing doesn’t get its own separate registration for everyday UK use — it must display the exact same registration number as the towing vehicle. A rear trailer number plate becomes a legal requirement whenever the trailer, caravan, or load you’re carrying (including bike racks) blocks the view of your car’s own rear plate.
✔ Must show the exact same reg as the towing vehicle – no substitutions
✔ Required whenever your car’s plate is obscured from view
✔ Must comply with BS AU 145e (correct font, spacing and reflective material)
✔ Should be lit or reflective so it stays visible after dark
👉 It doesn’t need to match your car’s plate style — a standard printed trailer plate is legal even if your car has 4D or gel plates fitted.
Note: this is separate from the DVLA’s international Trailer Registration Number (TRN) scheme, which only applies if you’re towing a trailer over 750kg abroad in Europe.
Upgrade Your Plate Style (Optional)
You can still customise your trailer plate with premium finishes:
– 4D number plates – Sharp, raised acrylic lettering
– 4D Gel number plates – Gloss + depth combined
– 3D gel number plates – Subtle gloss finish with raised gel characters for a premium look
👉 Upgrading your plate style adds a more premium look while staying fully legal.
Materials & Customisation Options
Every trailer number plate can be tailored to your preferences:
✔ Standard and custom sizes
✔ Choice of plate styles and finishes
✔ Borders and layout options
✔ Fixing kits available
Fast Turnaround & UK Delivery
✔ Same-day dispatch available
✔ Free UK tracked delivery
✔ Optional next-day delivery upgrades
✔ Same-day collection from our Hounslow store
What You Need to Order
As a DVLA-authorised supplier, we require:
✔ One form of ID (e.g. driving licence)
✔ Proof of entitlement to the registration (e.g. the towing vehicle’s V5C logbook)
👉 This ensures your plates are legally produced and compliant.
Why Buy From PlateBoss?
✔ DVLA-authorised number plate supplier
✔ 400+ 5-star reviews
✔ Premium materials across all products
✔ Fast turnaround times
✔ UK-based production
Explore our full range of number plates for other vehicle types.
Trailer Number Plates UK – Complete Guide
A trailer or caravan doesn’t receive its own registration mark for everyday UK use — it must display the same plate as the vehicle towing it. Getting the rules right on when a rear plate is legally required, and to what standard it must be made, is easy to overlook.
Upgrading to styles like 4D plates or 4D Gel plates lets you add a premium look to your trailer setup without compromising legality.
Final Word
If you’re looking for durable, road-legal trailer number plates with a clean, premium finish, PlateBoss has you covered.
Related Plate Styles: 4D Gel Plates | Short Number Plates | Hex Number Plates | Replacement Plates
