Ultra Low Emission Zone already in place and due to be expanded in 2021
London's Ultra-Low Emission Zone is the first Clean Air Zone of its kind, introduced by mayor Sadiq Khan in April 2019.
ULEZ is currently in place in the same part of central London as the Congestion Charge Zone and is in force 24 hours a day, seven days a week.
Pre-Euro 6 diesel cars, pre-Euro 4 petrols and pre-Euro 3 motorcycles are affected, having to pay £11.50 to enter the ULEZ - and that's on top of the £12.50 daily Congestion Charge.
Classic cars built before 1979 are exempt from the daily fee. Non-Euro VI HGVs, buses and coaches are charged £100 a day.
In the first few months, the number of older vehicles being used in the zone fell by 35 per cent. While this significantly reduce emissions, fewer CCZ and ULEZ payments are estimated to cost London £26million in revenues in the first year.
Under current plans, the ULEZ will be expanded on 26 October 2021 to cover all of the city inside the North and South Circular Roads, impacting hundreds of thousands of residents.
A £25million Scrappage Scheme7605553 has been launched to help low-income families replace their older cars with ULEZ-compliant models, though only offers £2,000 to owners if they scrap their out-of-date motors.