The Centre is held jointly between King's College London and Imperial College London and the air pollution epidemiology group at St George's, University of London, is affiliated with the Centre through King's College London. The main conceptual thrust for the Centre is to integrate individual-level and small-area analyses of environmental exposures and health using advanced geographical information systems (GIS) and statistical modelling techniques, combined with experimental data, biomarker and mechanistic studies, and analyses of large population cohorts to tackle environmental health problems of public health and scientific importance.