ULEZ and Clean Air Zones Explained: 2026 UK Guide

What is ULEZ (London's Ultra Low Emission Zone)?

The quick version: ULEZ is London's Ultra Low Emission Zone, where a non-compliant car pays £12.50 a day. A Clean Air Zone (CAZ) is the English equivalent in cities like Birmingham and Bristol, though most CAZs don't charge private cars at all. Scotland's Low Emission Zones (LEZs) work differently again — you can't pay to enter, so a non-compliant car is simply fined. And the London Congestion Charge is a fifth thing entirely, unrelated to emissions, that changed for electric cars in January 2026.

Whether a specific car is compliant comes down to its engine emissions standard, not its age or its badge — so before you buy, check the exact registration. Here's how each scheme works and where to check.

ULEZ charges the most polluting vehicles to drive anywhere in Greater London. It runs 24 hours a day, every day of the year except Christmas Day. If your car doesn't meet the standard, you pay £12.50 for each day you drive within the zone; if it does meet the standard, you pay nothing and don't need to register.

Which vehicles count as ULEZ-compliant

Compliance is based on the vehicle's Euro emissions standard:

• Petrol cars: Euro 4 or newer — most petrol cars registered from around 2006.
• Diesel cars: Euro 6 or newer — most diesels registered from around September 2015.
• Motorcycles: Euro 3 or newer.

The dates above are a rough guide only. Compliance is set by the actual emissions standard on the car, not the year on the plate — a diesel registered in early 2015 may not qualify, and the only way to be sure is to check the specific registration (see below).

The current ULEZ boundary and daily charge

Since 29 August 2023, ULEZ has covered all 32 London boroughs plus the City of London — the whole of Greater London. The charge for cars, motorcycles and vans up to 3.5 tonnes is £12.50 a day. Don't pay and you'll get a Penalty Charge Notice of £180, reduced to £90 if you pay within 14 days.

How to check if a specific car is ULEZ compliant

Use Transport for London's own vehicle checker at tfl.gov.uk — enter the number plate and it tells you whether that exact car pays. Or use our ULEZ check to check compliance as part of looking a car over before you buy.

What is a Clean Air Zone (CAZ) — and how is it different from ULEZ?

A Clean Air Zone is the same idea as ULEZ but run by individual English councils rather than TfL, and checked through a different service. The big difference: most CAZs don't charge private cars at all.

Which English cities have a live CAZ in 2026

There are seven active Clean Air Zones: Bath, Birmingham, Bradford, Bristol, Portsmouth, Sheffield and Tyneside (Newcastle and Gateshead).

Which vehicles actually get charged

This is where people misjudge it. The zones come in classes, and the class decides who pays:

• Birmingham (Class D) and Bristol (Class D) charge non-compliant private cars. Bristol is £9 a day for a car; Birmingham raised its car charge to £10 a day in 2026, up from £8.
• Bath, Bradford, Sheffield and Tyneside (Class C) charge buses, coaches, taxis, HGVs, vans and minibuses — not private cars.
• Portsmouth (Class B) charges buses, coaches, taxis and HGVs — again, not private cars.

So unless you're driving into Birmingham or Bristol, a private car is very unlikely to face a CAZ charge — but always confirm against the checker. Don't pay a charge you owe and the penalty is £120, halved to £60 if paid within 14 days.

Greater Manchester — why there's no CAZ there

Manchester is a common point of confusion. Greater Manchester was directed to set up a charging Clean Air Zone but that plan was dropped; the Government approved a non-charging, investment-led Clean Air Plan instead. So there is no Clean Air Zone charge to pay in Greater Manchester.

How to check CAZ compliance

The seven English zones are checked through one government service, "Drive in a clean air zone," at gov.uk — enter the registration and it tells you whether that vehicle pays in any of them. This is a separate service from TfL's London checker: a car cleared for London still needs checking for Birmingham or Bristol, and vice versa.

Scotland's Low Emission Zones — a different system entirely

Scotland's four biggest cities — Glasgow, Edinburgh, Aberdeen and Dundee — have Low Emission Zones. These run on the same Euro-standard idea, but with one crucial difference for drivers.

No pay option — you're fined instead

There is no daily charge you can pay to drive a non-compliant vehicle into a Scottish LEZ. If your car doesn't meet the standard, you don't pay to enter — you get a penalty. The first penalty is £60, reduced to £30 if paid within 14 days. It then doubles each time the same vehicle is caught in the same zone within 90 days, capped at £480 for cars and light goods vehicles (and £960 for buses and HGVs). Check a vehicle before travelling via the Scottish LEZ checker on the Low Emission Zones Scotland site.

The London Congestion Charge and electric cars — what changed in 2026

The Congestion Charge is not an emissions scheme — it's a charge for driving in central London on weekdays and weekend afternoons, and it applies regardless of how clean your car is. It matters here because the deal for electric cars changed at the start of 2026.

The end of the 100% discount and what replaced it

Until recently, zero-emission vehicles got a 100% "Cleaner Vehicle Discount" — electric cars paid nothing. That 100% discount ended on 25 December 2025.

It was not replaced by the full charge, and this is where a lot of outdated advice gets it wrong. From 2 January 2026 the standard Congestion Charge rose to £18 a day (from £15), and TfL introduced a new, smaller tiered discount for electric vehicles registered on its Auto Pay system: 25% off for electric cars — around £13.50 a day — and 50% off for electric vans and HGVs.

The discount only applies if the vehicle is on Auto Pay; without it, you pay the full £18. These figures and rules change on TfL's own timetable — always confirm the current rate at tfl.gov.uk before you rely on it.

So an electric car in central London is cheaper than a petrol one, but it is no longer free.

Why this is separate from ULEZ

Don't conflate the two. The Congestion Charge change does not touch ULEZ: zero-emission vehicles remain fully ULEZ-exempt regardless of the Congestion Charge discount ending.

How to check any specific car before you buy it

Running costs are part of the price of a car. Before you commit, check the exact registration against the schemes that matter for where you'll drive:

• London ULEZ and Congestion Charge: TfL's checker at tfl.gov.uk.
• English Clean Air Zones: the "Drive in a clean air zone" service at gov.uk.
• Scottish LEZs: the Low Emission Zones Scotland checker.

To fold this into a wider look at a car you're considering — including MOT history and whether it's road-legal — run a ULEZ check alongside an MOT check. Our guides to what an MOT actually tests and car tax bands explained cover the rest of what staying road-legal costs and requires.

A Comprehensive check then covers the bigger risks like outstanding finance, write-off history and mileage, so you're not buying a problem you can't see.

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