Ultra Low Emission Zone (Ulez) In London to reduce air pollution

The Ultra Low Emission Zone (ULEZ) in London operates 24 hours a day, 365 days a year across the Greater London area, covering a zone 18 times larger than the original central London boundary. The charge applies to vehicles that don't meet minimum emission standards: Euro 6 for diesel vehicles and Euro 4 for petrol vehicles.

Who Is Affected

Any vehicle that enters the ULEZ boundary and doesn't meet the emission standards is subject to the daily charge: £12.50 for cars, motorcycles, and vans, and £100 for heavier vehicles including lorries, buses, and coaches. Vehicles that are exempt from the Congestion Charge are not automatically exempt from ULEZ.

Fleet operators running older diesel vehicles in London face the most significant exposure. Euro 5 diesel vehicles — which were compliant with previous emission standards — do not meet the Euro 6 threshold required for ULEZ exemption.

The Compliance Options

Operators have three broad options: retrofit older vehicles with approved emission reduction technology, replace non-compliant vehicles with compliant alternatives, or pay the daily charge. For operators making multiple London journeys daily, the charge can accumulate rapidly — making vehicle replacement or retrofit a more economically rational choice.

The Broader Context

The ULEZ expansion reflects a clear regulatory direction: urban air quality requirements will become more stringent over time, not less. Fleet operators who plan vehicle procurement and replacement cycles with clean air zone requirements in mind will be better positioned than those who replace vehicles reactively when charges become prohibitive.