Air Quality Restrictions

This chapter covers the implementation dates, vehicle requirements, access charges and enforcement of the London Low Emission Zone (LEZ) and Ultra-Low Emission Zone (ULEZ). It does not currently include Clean Air Zone (CAZs), as the details and scope of these are still to be confirmed – for the latest information on CAZs, please see FTA’s member-only briefing note - CAZ Briefing Zone.

Updates for 2025:

  • Update for the enforcement of Low Emission Zones in Scotland.

  • Removal of the retrofit fund section. 

Download the air quality restrictions chapter of the Yearbook of Road Transport Law