London's ultra low emission zone (Ulez) in London imposes limitations on vehicle emissions with the aim of reducing pollution.
It is a similar scheme to those that exist in other UK cities and in Europe.
Vehicles which do not meet emissions standards incur a daily charge of £12.50 in the capital.
Ulez is due to expand to include outer London boroughs from 2 August.
The fine for failing to pay is £180.
Clean air campaigners highlight its importance to tackle the impact of pollution, particularly on children’s health, but detractors claim it is an unfair charge at a time when many are struggling financially.
For more visit Independent TV: https://independent.co.uk/tv
Click here to subscribe to The Independent: https://bit.ly/Subscribe-to-Independent
About The Independent:
Making Change Happen. The Independent is the world’s most free-thinking newsbrand, providing global news, commentary and analysis for the independently-minded.
Connect with The Independent:
Check out our full video catalog: /c/theindependent/videos
Videos, daily editorial and more: http://www.theindy.com
Click here to get the best of The Independent daily: https://www.independent.co.uk/newsletters
Like The Independent on Facebook: https://www.fb.com/TheIndependentOnline
Follow The Independent on Twitter: https://twitter.com/Independent
Follow The Independent on Instagram: https://www.instagram.com/the.independent
Download the iOS & Android app: https://www.independent.co.uk/subscribe/app
Help to support truly independent journalism. Every dollar you contribute will directly fund additional special reports and investigations from a free-thinking, award-winning newsroom you can trust - https://www.independent.co.uk/donations
Subscribe to Independent Premium for exclusive content & live events: https://bit.ly/2MiOONB