Clean Air Zones CAZ

Clean Air Zones (CAZ) - the latest updates

09th Apr 2021

With the introduction of numerous additional Clean Air Zones (CAZ) across the UK becoming increasingly likely it is now more important than even to consider the use of alternatively fuelled vehicles. We have pulled together the latest updates on CAZ’s across the UK.

By the end of 2019 there were 10,843 electric or alternatively fuelled vans in circulation in the UK. The increasing number of plans for Clean Air Zones and similar access-restrictive air quality schemes across the UK sees the demand for alternatively fuelled vehicles rapidly rising and the cost implications for drivers and fleets increasing.

We have 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

Confirmed CAZ Schemes this year:

1st March 2021- London LEZ

There has been a tightening up of the Greater London Low Emission Zone. All HGVs, busses and coaches are now included with vehicles required to meet the Euro 6 emission standards. Vehicles should not omit more than 75g/Km CO2 to be eligible for the Cleaner Vehicle Discount. Fore more information take a look here. 

15th March 2021 – Bath

Class C Busses, coaches, taxi’s, PHVs, HGVs and vans will be affected by this update which includes the City centre zone, A4 and A36. Non-compliant HGVs will be required to pay £100 to entre the zone, whilst non-compliant vans will be charged £9. 

Vehicles entering this zone in bath have been monitored via ANPR since 1st December 2020 but daily charges will not be implemented until after March 15th. 
More information and guidance can be found here.   

1st June 2021 – Birmingham

The restrictions will cover all roads within the A4540 Middleway ring road and will affect Class D vehicles which cover Buses, Coaches, Taxis, PHVs, HGVs, vans and cars. Non-compliant cars, taxis and vans will pay £8 per day and HGVs, coaches and buses will pay £50 per day.

Prior to the Clean Air Zone going live, early notice letters will be sent out throughout May 2021 to drivers who have driven within the A4540 Middleway in vehicles that will be charged once the Clean Air Zone is launched. These letters will warn motorists that from 1 June 2021, if they drive through the Clean Air Zone in that same non-compliant vehicle, they will be subject to charges. The letter will include details of how and when payments will need to be made in the future. If you or one of your drivers has received an Early Notice Letter advising that one of your vehicles will be subject to daily charges, find out what to do next here.

For more detailed information on the CAZ in Birmingham, which areas are affected, which vehicles are exempt and how to apply for exemptions, please take a look at the Brum Breathes website.

25th October 2021 – London ULEZ Expansion

The expansion for London covers inner London between but not including the North and south Circulars. HGV’s, busses, vans and cars with diesel engines will need to meet Euro 6. All petrol vans and cars will need to meet Euro 4 and all motorbikes Euro 3. 

Also, from this date only pure electric vehicles will be eligible for the CVD. All other vehicles regardless of their emission status will have to pay the congestion charge.
More guidance and information can be found here.

November TBC - Portsmouth 

Portsmouth City Council are going to implement a class B CAZ in November 2021, which will impact coaches, buses, HGVs, taxis and private hire vehicles. The CAZ will cover an area focused around the city centre and south-west of Portsea Island.

CAZ Schemes still in development:


The planned zone includes the inner ring road and will impact Class C Buses, coaches, taxis, PHVs, HGVs and vans. Daily fees look to be set at band C (£10 per day) and £50 for HGVs. 

Newcastle, Gateshead and North Tyneside

The city centre CAZ was planned for January 2021 but has been delayed. Plans show it will implement a Class C zone impacting Buses, coaches, taxis, PHVs, HGVs and vans. Daily fees look to be set at £12.50 per day and £50 for HGVs. The councils are offering grants, subject to Government funding.


Bristol’s CAZ is planned for the end of 2021 (October at the earliest) and will cover the city centre. Class D vehicles will be affected. More information will be available once the Government has confirmed its decision on the business case that was submitted.  


It has been confirmed that Portsmouth must implement a Class B clean Air Zone by November 2021.The CAZ will cover the city centre, affecting Buses, coaches, taxis, PHVs, HGVs and vans. The proposal was submitted in 2020 and it is expected a final decision will be made this spring.


Bradford’s CAZ is expected for January 2022 and will include the city centre including the outer ring road. Government funding will be available to support business and more information can be found here.

Greater Manchester  

Expected to start Spring 2022, this is a citywide CAZ affecting Class C vehicles but vans and minibuses will be except until 2023. The daily charge for HGVs will be £60 per day from 2022 with vans charged £10 per day from 2023. More information can be found here.

Sefton (Merseyside)

This scheme is not yet determined but is expected to affect Class B vehicles.


Councils are opposed a CAZ and the current plans being discussed are around a speed limit reduction on the A127 and new proposals for a pedestrian and cyclist crossing scheme.


A potential CAZ for Slough is currently undergoing a feasibility study. 

Heathrow Airport 

Initial proposals mirror the ULEZ requirements already in place in London (Euro 4 petrol and Euro 6 diesel) seeing potential charges between £10-£15 affecting passenger cars and PHVs entering car parks and drop off areas within Heathrow’s Terminals.

Leicester City

Leicester City Council is in the process of agreeing its final business plan with the Joint Air Quality Unit and is no longer proposing a CAZ in its recommended plan. However, this still needs to be agreed with the Secretary of State.   

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. 

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


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.  


Plans to implement Low Emission Zones (LEZ) across Glasgow, Edinburgh, Aberdeen and Dundee have been paused temporarily due to the Covid-19 outbreak. Unlike England, Scotland is looking at complete bans across it’s LEZs, with no option for charges for non-compliant vehicles.

More information can be found here. 

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.