London Mayor Sadiq Khan has said almost four million Londoners will benefit from today's expansion of the capital's Ultra Low Emission Zone.

"It's a big day for our city and I'm really proud," he said of the move, which aims to improve air quality by imposing a pollution charge on older vehicles in all areas within the North and South Circular roads. Report by Buseld. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn