Not applying to cars, but diesel-fuelled buses, HGVs, coaches and most controversially – taxis, city centre drivers must meet strict standards for their commute under the current proposals. Most diesel vehicles built after 2015 adhere to the standards. Petrol vehicles would have to comply with the standards of Euro V, applying to most vehicles built since 2011.
via Clean Air initiative to combat air-pollution in Nottingham City Centre.