Sadiq Khan at Sir John Cass’s Foundation primary school roof garden where he announced new plans to clean up London’s air pollution (Image: S. Rousseau/PA)

London Mayor Sadiq Khan to more than double size of London’s clean air zone

New mayor of London calls air pollution ‘our biggest environmental challenge’ and plans to bring the increased ultra low emission zone into force early The new mayor of London Sadiq Khan has made his first major policy announcement, unveiling plans to substantially increase the size of London’s clean air charging zone to tackle the capital’s