ADR Placards in 2026: Renewal Checklist for UK Dangerous Goods Operators
A practical 2026 renewal checklist for ADR orange placards and hazard plates, with UN number guidance, mounting rules and a sensible reorder cadence.
ADR — the European agreement on the international carriage of dangerous goods by road — is updated on a two-year cycle. The 2025 edition is the live version through 2026, and there are a handful of placard and plate changes that catch operators out at audit.
What an ADR placard actually has to do
An orange-coloured plate identifies a vehicle as carrying dangerous goods. Where required, it carries a Hazard Identification Number (the "Kemler code") above a UN number below — both legible from distance, both retroreflective enough to be readable at night, and both mounted so they remain visible when the vehicle is loaded, in motion or parked.
Hazard diamond placards (the class labels — flammable, corrosive, toxic, oxidiser and so on) sit alongside the orange plates and identify the specific class of goods on board.
2026 renewal checklist
Run this list at every annual inspection and at every vehicle reassignment:
- Orange plates present front and rear, undamaged, retroreflective
- UN numbers and Kemler codes match the load and the transport document
- Plates can be removed or covered when the vehicle is empty and cleaned
- Hazard diamonds match the class of goods and are not faded or peeling
- Mounting brackets are secure and have not corroded
- Stowage location for spare blank plates is known and accessible
The most common audit findings
In our experience the three most common findings are: faded retroreflectivity on plates more than five years old, mismatched UN numbers because a load changed but plates were not updated, and missing rear plates on drawbar trailers. None of these are difficult to fix — they are admin failures, not engineering failures.
A sensible reorder cadence
Order plates and placards as part of the same annual cycle as your driver ADR refresher training and your dangerous goods safety adviser review. Buy a small overstock of blanks so a damaged plate never takes a vehicle off the road overnight. FleetPrint+ stores your per-vehicle plate spec — class, UN number, size, mounting — so reordering is a single click rather than a fresh quote.