Air Quality Alerts have been issued in London as report released calling for new limits to limit pollution

CLEAN: Shows aerial shots cloud of smog and pollution rising above Central London with towers of buildings at Canary Wharf poking through. High pollution levels in London have led to air quality alerts being declared at bus stops, Tube stations and roadsides. The city's Mayor Sadiq Khan says people should "take appropriate measures to protect themselves" NB> THIS CLIP IS MUTE on December 01, 2016 in London, United Kingdom.