Patient postcode linked measures are available for patients in English practices that have consented to participate in the linkage scheme. The latest available patient postcode of residence is mapped to an LSOA boundary. The LSOA of residence then allows linkage to several measures of area level deprivation and a rural-urban classification. These measures can be used as a proxy for socio-demographic and socio-economic data which are generally poorly recorded in the primary care data given they do not directly relate to a patient's care. Access is provided by CPRD subject to protocol approval. Further information is available at https://www.cprd.com/linked-data.