at Croydon, South Croydon, Caterham, Mitcham, Coulsdon, Thornton Heath and Purley. Map See also List of postcode areas in the United Kingdom Postcode Address File References External links Royal Mail's Postcode Address File A quick introduction to Royal Mail's Postcode Address File (PAF) Postcode areas covering London Postcode areas covering South East England Media and communications in the London Borough of Croydon Media and communications in the London Borough of Merton