Euro 6 is the sixth and latest directive set by the European Union to help reduce the level of harmful pollutants produced by new vehicles.
Euro 6 measures put even stricter limits on diesel emissions, aiming for a 50% reduction in Nitrogen oxides produced by new vehicles.
The Minibuses below meet the Euro 6 emission standards.
The ULEZ scheme is designed to improve London's air quality, which means only vehicles that meet the latest emissions standards will avoid the fine. For diesel vehicles, this means complying with Euro 6 standards while petrol vehicles need only meet Euro 4 standards.
From October 2021 it will expand enormously, covering the area within the north and south circular roads. That covers everything from Ealing in west London to East Ham on the other side of the city and Edmonton in the north to Clapham in the south.
The fine for driving a minibus in the ULEZ which does not meet the Euro 6 standards is £12.50 for minibuses up to 3.5 tonnes and £100 per day for any minibus which is heavier than 3.5 tonnes.
The CAZ scheme is designed to improve Birmingham's air quality. Minibuses will need to meet the Euro 6 standards from June 2021.
The fine for driving a Minibus in the CAZ which does not meet the Euro 6 standards is £8 per day for minibuses up to 3.5 tonnes and £50 per day for any minibus which is heavier than 3.5 tonnes.
The Government has directed Greater Manchester to introduce a Category C Clean Air Zone. The Zone is anticipated to be introduced on Monday 30 May 2022.
The proposed daily charge for a Minibus in the Manchester CAZ, which doesn't meet the Euro 6 standards, is £10. There is a temporary exemption until 31 May 2023.