London saw 13% fall in nitrogen dioxide levels in 2019 but its still worst in UK
It comes after Sadiq Khan introduced an Ultra Low Emission Zone in April 2019
But a list of 800 most-polluted roads has revealed 600 are currently in London
Landmark inquest ruled air pollution contributed to nine-year-old girl s death
33 out of 43 UK air quality zones still have nitrogen dioxide above legal limits
The Marylebone Flyover in London is the most-polluted spot in the country
London recorded the biggest annual reduction in air pollution last year of any area of Britain - but it is still at illegal levels and the worst air quality in the country.
The capital, whose Mayor Sadiq Khan introduced an Ultra Low Emission Zone in April last year, saw a 13 per cent fall in nitrogen dioxide levels in 2019 from 2018.
The analysis by environmental legal firm ClientEarth has emerged after a landmark inquest ruled that air pollution contributed to an asthmatic nine-year-old girl s death.
Key pollutants in the air are from vehicles are nitrogen dioxide and particulate matter (PMs). While pollutant levels have fallen in recent years, ClientEarth found 33 out of 43 UK air quality zones still have levels of nitrogen dioxide that are above legal limits.