The Ultra Low Emission Zone is a daily charge for driving non-compliant vehicles in Greater London. It launched in central London in April 2019, expanded to the North and South Circular in October 2021, and went London-wide on 29 August 2023. The standard charge is £12.50 per day. Transport for London enforces with a network of ANPR cameras. If you drive a non-compliant vehicle and do not pay by midnight the third day after the journey, TfL issues a Penalty Charge Notice. The PCN is £180, reduced to £90 if paid within 14 days, and rises to £270 once a charge certificate is issued. Legal basis is the Greater London Low Emission Zone Charging Order 2006 (as amended by the Mayor's ULEZ Variation Orders), together with the GLA Road Traffic Order 2003 and Part 6 of the Traffic Management Act 2004. You appeal first informally to TfL, then formally, then to London Tribunals.
Grounds that work for ULEZ pcns
The vehicle is actually ULEZ-compliant
The single most common error is TfL treating a compliant vehicle as non-compliant. Petrol cars are compliant if they meet Euro 4 (broadly first registered after January 2006) and diesels if they meet Euro 6 (broadly first registered after September 2015). Some older cars have been retrofitted or had their emissions certificate reissued. Use the TfL vehicle checker against your V5C and any DVSA emissions records, take a screenshot of the result, and send it with your representation. If the checker still says non-compliant but you hold a Certificate of Conformity from the manufacturer showing the actual Euro standard, attach that too. TfL must cancel where the vehicle meets the standard.
Charge was paid before the deadline
The ULEZ charge is due by midnight on the third day after the journey, so you have a generous window: travel on Monday, pay by midnight Thursday. If you paid in time but TfL did not match the payment, your bank statement is the evidence. Common reasons for mismatches: typing the registration with a confused 0 versus O or 1 versus I, paying against a previous keeper's vehicle, or paying for a different date in the auto-pay calendar. Send TfL the payment receipt, the registration as it appears on the V5C, and ask them to reconcile. If they refuse, London Tribunals will cancel on documentary evidence.
Vehicle on hire or lease, liability not properly transferred
Under regulation 14 of the Civil Enforcement of Road Traffic Contraventions (England) General Regulations 2022, a hire firm can transfer liability to the named hirer by serving the agreement and a statement of liability. The agreement must cover the date of the journey. If you are the hirer and TfL has billed you direct, request the transfer paperwork from the hire firm; if the chain is incomplete, the PCN against you fails. If you sold the vehicle before the journey, the V5C/2 sale slip dated before the journey date is your evidence. TfL should reissue the PCN to the new keeper or cancel.
Exempt or temporary exempt vehicle
Several exemptions apply under the Greater London Low Emission Zone Charging Order 2006: vehicles in the disabled or disabled-passenger tax class, agricultural and historic vehicles (over 40 years old and unmodified), and certain showmen's vehicles. NHS patients on chemotherapy or dialysis can claim a temporary exemption through the TfL exemption register. If you qualify but were not registered at the time of the journey, you can apply retrospectively for some categories. Send DVLA evidence of the tax class, the historic vehicle status, or the medical letter, and ask TfL to apply the exemption to the dates in question.
PCN served out of time or defective in content
Under Schedule 1 of the 2022 Regulations, TfL must serve the PCN within six months of the contravention and the Notice to Owner within six months of the PCN. Regulation 9 sets out the required content: date, time and location of the contravention, the amount of the penalty, the discount and full-penalty amounts, and the procedure for representations. London Tribunals applies these requirements strictly. Late service or missing fields are a clean ground to cancel. Check the PCN closely, particularly the date and time stamp on the ANPR image against the dates stated in the body of the PCN, and raise any inconsistency in your representation.
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Local detail: ULEZ
- The central London ULEZ launched on 8 April 2019 inside the Congestion Charge zone.
- The zone expanded to the North and South Circular on 25 October 2021.
- ULEZ went London-wide on 29 August 2023, covering all 32 boroughs and the City.
- Standard daily charge is £12.50, on top of any Congestion Charge or Low Emission Zone charge for HGVs.
- Petrol vehicles must meet Euro 4, diesels must meet Euro 6.
- TfL operates more than 2,750 ANPR cameras across the expanded zone.
- Appeals are heard by Environment and Traffic Adjudicators at London Tribunals in Chancery Exchange, EC4.