'Filthy glamour': could polluted Marylebone Road help fix London's air?

Marylebone Road has the odd distinction of being the world’s most studied road in terms of air pollution – yet remains a chief culprit in London’s ‘shameful’ air quality. Now it’s home to a series of new experimentsDaybreak in the capital and on the pavement opposite Great Portland Street underground station runners cut virtuous paths through a crisp, cold winter’s morning. To one side of them lies Regent’s Park, deep green beneath a perfect frost.