Chris Griffiths is a practising GP and Professor of Primary Care at Barts and the London Medical School. He’s also co-founder of Asthma UK Centre for Applied Research, and co-founder of Doctors Against Diesel.

He took time out from his very busy schedule to tell Real Media why he is passionate about air quality and why he has expanded from pure research to lobbying and protesting about what he sees as a medical emergency in our cities.