Low Emission Zone- Your Guide
The Low Emission Zone (LEZ) was introduced in 2008 to encourage the most polluting heavy diesel vehicles driving in London to become cleaner. The LEZ covers most of Greater London. To drive within it without paying a daily charge these vehicles must meet certain emissions standards that limit the amount of particulate matter (a type of pollution) coming from their exhausts.
Despite significant improvements in recent years, London's air pollution is still a concern.
So much so, that from 3 January 2012 the LEZ emissions standards will become more stringent. More vehicles will be affected, and those that are already affected will need to meet tighter emissions standards.
For further information see this LINK