1 Violence and Society Centre, City, University of London, London EC1V 0HB, UK; Institute of Social Justice and Crime, University of Suffolk, Ipswich, UK.
2 Violence and Society Centre, City, University of London, London EC1V 0HB, UK; School of Health and Psychological Sciences, City, University of London, London EC1V 0HB, UK; National Centre for Social Research, London, UK. Electronic address: sally.mcmanus@city.ac.uk.