Platform trailers are workhorses on UK building sites, farms, and logistics operations, but hiring the wrong one—or overlooking critical checks—can lead to costly delays, safety problems, or legal trouble. Before booking, there are specific inspections and details to verify to ensure you get a suitable, roadworthy trailer that meets your needs and the law.
Check the Trailer's Weight and Payload Capacity
The first and most important step is confirming the maximum authorised mass (MAM) and payload capacity of any platform trailer you consider. This isn't just a practical matter; under UK law, exceeding a trailer's certified weight limits is an offence that can result in fines, vehicle impoundment, and driving prohibition.
Ask the hire company for the vehicle's specification sheet, which must clearly state the unladen weight (the empty trailer) and maximum payload. Calculate your intended load weight—including any securing equipment—and ensure there's a safe margin below the limit. Remember that payload capacity is the difference between MAM and unladen weight.
If you're towing a trailer with a heavier vehicle, also verify that your towing vehicle's braking system and chassis are rated for that trailer's mass. The DVSA (Driver and Vehicle Standards Agency) provides guidance on towing limits, and overloading is a strict liability offence.
Verify Brake Condition and Coupling Type
Brakes are non-negotiable. Request a recent brake test certificate from the hire company. Platform trailers over 750 kg MAM must have functioning brakes; those between 750 kg and 3,500 kg require either overrun brakes or coupling-actuated brakes, depending on design. Over 3,500 kg, air brakes or equivalent systems are mandatory.
Examine the coupling in person if possible. Common types include tow balls, drawbars, and fifth-wheel couplings. Ensure the coupling matches your towing vehicle and is secured properly. A loose or mismatched coupling is both dangerous and illegal.
Test the electrics on the day of hire. Lights—brake, reversing, and indicator—must work correctly. Modern trailers use 13-pin or 7-pin connectors; confirm yours matches your towing vehicle's socket.
Inspect Tyres, Suspension, and Chassis Condition
Tyres should have a minimum tread depth of 1.6 mm across the central three-quarters of the tyre, as per the Highway Code. However, for trailers carrying heavy loads over distance, deeper tread is safer. Check for uneven wear, bulges, cuts, or perishing. Ask when tyres were last replaced and consider requesting a spare.
Examine the suspension springs and dampers for rust, cracks, or damage. On leaf-spring suspensions, check that no leaves are broken. Poor suspension affects braking efficiency, payload stability, and safety.
Walk around the entire chassis and platform decking. Look for rust perforation, particularly underneath. Small surface rust is normal, but structural rust that weakens the frame is a safety concern. If the trailer carries anything of value or hazardous, a weakened chassis increases accident risk.
Confirm Paperwork and Insurance Requirements
Obtain a copy of the trailer's MOT certificate and ensure it's current. Trailers over 3,500 kg MAM require annual MOT testing; lighter trailers do not, but the hire company should still maintain them to safe standards. Request evidence of maintenance records.
Clarify what insurance cover is included with the hire. Most hire companies provide public liability and damage waiver cover, but confirm the excess, any exclusions, and whether your own vehicle's insurance recognises hired equipment. Some insurers require notification before towing a hired trailer.
Check whether you need a special driving licence category. If your towing vehicle plus trailer exceeds 3,500 kg combined MAM, you must hold category B+E or C+E on your licence. The hire company may ask to sight your licence; if they don't, it's still your legal responsibility to ensure compliance.
Request Documentation and Make a Pre-Hire Checklist
Before finalising the booking, ask the hire company for:
- A signed specification sheet confirming MAM, payload, and unladen weight
- MOT certificate and most recent brake test
- Photographic evidence of the trailer's condition (or arrange an inspection)
- Copies of any manufacturer's manuals for braking or coupling systems
- Clear information about load securing regulations and tie-down points
On collection day, inspect the trailer physically, test all electrics and brakes, and note any pre-existing damage on a damage waiver form. Take photographs. If anything looks wrong or unsafe, raise it immediately and consider using a different provider rather than risking liability.
Finding the right platform trailer starts with thorough checks before you book. GetBrent.co.uk connects you with verified hire companies across the UK, from trailer hire in London to regional providers like those offering trailer hire in Maidstone. Browse platform trailer options and contact local companies with confidence, knowing what questions to ask.