蜜芽传媒

The expansion of the Ultra Low Emission Zone has had a "positive impact" on air quality and has reduced harmful emissions from cars and vans, according to a City Hall report.

London鈥檚 Mayor Sadiq Khan claimed it was "better than predicted" but the Tories said hundreds of millions of pounds had been spent on a "minimal reduction" in pollution.

So what do the figures say? And can we trust City Hall's own data?

蜜芽传媒 Radio London's Eddie Nestor has been through it all with 蜜芽传媒 London's Political Editor Tim Donovan.

(Image credit: Getty Images)