Sadiq Khan joins air pollution court case against UK government

Mayor of London will submit statement and evidence in high court case brought by ClientEarth on the air pollution crisis in the capital

The mayor of London, Sadiq Khan, has joined a high court challenge against the government over its air pollution plans, overturning the position of his predecessor, Boris Johnson. Khan filed legal documents on Thursday and can now submit a witness statement and evidence to the court on the air pollution crisis in the capital.

Environmental lawyers ClientEarth are suing the government for the second time in a year, having won a case at the supreme court in 2015 which ordered ministers to fulfil their legal duty to cut pollution in "the shortest time possible". The new case argues the government is still failing to do this.