Do I need to display anything to show my car is ULEZ compliant?

No stickers, badges, or permits are required for ULEZ compliant vehicles. The system works entirely through automatic number plate recognition (ANPR) cameras that check your registration against the DVLA database. 

When you enter the zone in a compliant vehicle, the cameras recognise that your car meets the standards and no charge applies. This automatic system means no paperwork or displays are needed - instead, your vehicle's compliance is linked to its registration number.