We have pulled together the latest updates on CAZ’s across the UK and looked at the latest information on these planned schemes in a run down by city below. 

In the following updates charging scheme classifications are also referred to. These classifications are outlined in the Defra Clean Air Zone Framework and more information can be found here.

CAZ charging scheme classifications:

Class A - Buses, coaches, taxis and PHVs
Class B - Buses, coaches, taxis, PHVs and HGVs
Class C - Buses, coaches, taxis, PHVs, HGVs and vans
Class D – Buses, coaches, taxis, PHVs, HGVs, vans and cars


CAZ's planned for later this year:


London ULEZ Expansion

This expansion concerns inner London between, but not including the north and south Circulars and will be in place from 25th October 2021. To be eligible vehicles must meet the Euro 6 emission standard and emit no more than 75g/km CO2 and have a minimum 20-mile zero emission capable range (a £10 annual registration fee applies). The charges have been outlined as: HGVs Euro 4 & 5: £100, HGVs Euro 3 and older: £300, Vans and cars: £12.50.

From 25 October 2021, only pure electric vehicles will be eligible for the Cleaner Vehicle Discount (CVD) (all other vehicles, regardless of their emissions status will be required to pay the Congestion Charge). 

From 25 December 2025, the CVD scheme expires, and all vehicle types will have to pay the Congestion Charge.

Expansion includes:

  • Euro VI/6 for all diesel-engined HGVs, buses, coaches, vans and cars.
  • Euro 4 for all petrol-engined vans and cars.
  • Euro 3 for motorbikes

More information on the CVD: https://tfl.gov.uk/modes/driving/cc-cvd-before-you-begin?sourceRoutingKey=discounts-and-exemptions


Portsmouth CAZ

Portsmouth City Council will implement a class B clean air zone in November 2021, which will impact coaches, buses, heavy goods vehicles (HGVs), taxis and private hire vehicles of certain standards. The CAZ will cover an area focused around the city centre and south-west of Portsea Island.

The daily charge for non-compliant HGVs will be £50.

A Clean Air Fund has been created to provide financial support for business impacted by the new zone and more information can be found here:  https://travel.portsmouth.gov.uk/schemes/charging-clean-air-zone/ 

All schemes in place and those planned for the future

Trouble viewing the table below? You can download a larger PDF version here. 

The latest updates on Clean Air Zones (CAZ) across the UK

Cities opting not to implement CAZ Schemes:

The following cities are looking to implement schemes but have chosen not to go with CAZ. we will update with ore details on these when we have them. 

  • Coventry
  • Derby
  • Leeds
  • Middlesbrough
  • Nottingham
  • Southampton
  • Basildon


Wales has published A Clean Air Plan which will mainly focus on cars, taxis and busses and as well as speed limit changes does include plans to revisit CAZ in Wales. The plan includes a CAZ framework to be published in a white paper in Spring 2021 and Local Air Quality Management (LAQM) policy changes by 2023.

More information can be found here and within the Clean Air White Paper: https://gov.wales/welsh-government-launches-clean-air-white-paper-and-report-impact-lockdown-air-quality


Scotland’s Low Emission Zones are complete bans, there is no option to pay a daily charge for non-compliant vehicles to access the zones.

Work on developing Scotland’s LEZs was paused due to the Covid-19 pandemic. Unfortunately, at this stage there are no precise dates, but work on Scotland’s LEZ has restarted. The LEZ’s across Glasgow, Edinburgh, Dundee and Aberdeen will be introduced between February 2022 and May 2022. However, each city council has indicated that they will be considering grace periods to allow the public and commercial operations to prepare.

More information can be found here: https://www.lowemissionzones.scot/

Compliance options:

Vehicle replacement - Replace non-compliant vehicles with Euro VI/6 vehicles or electric (in the case of vans).

Pay the daily charge – payment of (not in Scotland)

Retrofit - The Clean Vehicle Retrofit Accreditation Scheme (CVRAS) is operated by the Energy Saving Trust (EST). There may be companies which claim they can provide a solution, but such devices must be approved by the EST.  Find out more here: https://energysavingtrust.org.uk/service/clean-vehicle-retrofit-accreditation-scheme/

Central charging system – There is a single charging portal for all CAZs in England, to avoid the need for operators to register their fleet with each city individually. The portal can be accessed here: https://www.gov.uk/check-clean-air-zone-charge

Get in touch

Need advice on how this might affect your fleet and any future vehicle purchase plans? Our team can help talk it though and offer advice on what will and won't be affected. Just get in touch using the link below and we will get back to you.