Government set to face fresh legal challenge over air pollution crisis

Legal NGO ClientEarth to take the government back to court if it fails to set out a new range of measures to tackle Britain's toxic air

Environmental campaigners are set to take the government back to court over what they say are ministers' repeated failings to deal with the UK's air pollution crisis.

ClientEarth, which has already won two court battles against the government, has written a legal letter demanding that the environment secretary Michael Gove sets out a range of new measures to address air pollution which contributes to the deaths of 40,000 people across the UK each year.