[1][2][3] He is emeritus professor of respiratory epidemiology and public health at the National Heart and Lung Institute, Imperial College London.
[4] He studied Modern History at University of Oxford, trained in Medicine at the Middlesex Hospital Medical School and then Public Health with Walter W. Holland in the Department of Community Medicine, St Thomas's Hospital Medical School, London.
He became the Chair in Public Health Medicine at United Medical and Dental Schools of Guy's and St Thomas' Hospitals in 1995, and then Head of the Division of Public Health and Primary Care at King's College London.
[11] As result of his work, he has provided evidence on asthma and allergy to the Lords Select Committee on Science and Technology in 2006[12] and has been interviewed by mainstream media.
[13][14][15] In 2014, he contributed to a European Respiratory Society video about the Burden of COPD - ERS Vision.