Clean Air Zones in the UK: Locations, Charges and What Drivers Need to Know

Clean Air Zones (CAZs) are now a core part of the UK’s strategy to reduce urban air pollution, particularly nitrogen dioxide (NO₂), a major contributor to respiratory and cardiovascular disease. With rules differing by city and regular updates to schemes, drivers and fleets need a clear, up-to-date view of where charges apply, and how to stay compliant.

A Clean Air Zone is a defined urban area where local authorities take action to improve air quality, often by charging the most polluting vehicles to enter.

There are two types:

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  Non-charging CAZs: Focus on traffic flow, public transport and infrastructure improvements
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  Charging CAZs: Apply daily fees to vehicles that don’t meet emissions standards
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  Most high-profile UK schemes are charging zones, supported by ANPR (camera) enforcement.

England's CAZ framework is standardised into four classes:

Class D zones are the most restrictive and the only ones that typically charge private motorists.

To avoid charges, vehicles must meet minimum emissions standards:

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  Petrol: Euro 4
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  Diesel: Euro 6

As of May 2026, seven English cities/conurbations operate CAZs, with varying rules:

Of the seven cities operating CAZs, only Birmingham and Bristol charge non-compliant private cars.

London operates a separate system, the ULEZ, which:

• Covers all London boroughs
• Runs 24/7, year-round
• Charges £12.50/day for non-compliant cars

Outside England’s CAZ framework, additional schemes apply:

Scotland (Low Emission Zones – LEZs)

There LEZs located in the following Scottish cities:

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  Glasgow
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  Edinburgh
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  Aberdeen
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  Dundee

There is no daily charge option for LEZs in Scotland. Non-compliance results in fines starting at around £60.

Oxford (Zero Emission Zone – ZEZ)

Charges apply to most petrol/diesel vehicles, starting at £2, rising to £10 depending on emissions.

The fee can be paid up to six days before or after the vehicle is driven in zone, with the charge payable online.

Charges vary by city and vehicle type, but typical daily fees include:

• Cars (Class D zones): £8–£9
• Vans: £9–£12.50
• HGVs / buses: £50–£100

Failure to pay usually results in fines starting at £60–£120 outside London.

No major new charging CAZ cities in 2025–2026

• •
  The number of charging CAZ locations in England has stabilised at seven
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  Several proposals (e.g. Greater Manchester) were scaled back or cancelled in favour of non-charging measures

Expansion has focused on:

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  ULEZ expansion (London) coverage completed before 2026
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  Scottish LEZ enforcement tightening
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  Increased enforcement and compliance checks rather than new zones

“Most CAZs charge private cars”

️ Reality: Only Class D CAZs (Birmingham, Bristol) charge cars in England

“All UK cities have Clean Air Zones”

Reality: Only a limited number of cities have implemented CAZs, others use alternative solutions

“You can always pay to enter”

Reality: Scottish LEZs do not allow pay-to-enter, penalties apply immediately

Clean Air Zones are no longer expanding rapidly, but they remain high-impact for certain routes and vehicle types.

For fleet operators:

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  Focus on Euro 6 diesel or electric to ensure compliance across all zones
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  Pay particular attention to London, Birmingham and Bristol, where costs for non-compliant vehicles are highest

For business drivers:

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  Always check routes before travel
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  Be aware that entering a CAZ even once per day triggers a full charge

The UK’s Clean Air Zone network in 2026 is mature but fragmented, with:

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  A limited number of charging cities
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  Significant variation in rules
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  Increasing enforcement rather than expansion

For drivers and fleets, compliance, not avoidance, is now the most efficient strategy.