Study title

Abstract copyright UK Data Service and data collection copyright owner.Understanding Society (UK Household Longitudinal Study), which began in 2009, is conducted by the Institute for Social and Economic Research (ISER) at the University of Essex, and the survey research organisations Verian Group and NatCen. It builds on and incorporates the British Household Panel Survey (BHPS), which began in 1991.For full details of the main Understanding Society study, see SN 6614. The Understanding Society: Waves 1-14, 2009-2023 and Harmonised BHPS: Waves 1-18, 1991-2009: Secure Access dataset contains British National Grid postcode grid references (at 1m resolution) for the unit postcode of each household surveyed, derived from the ONS National Statistics Postcode Directory (ONSPD). Grid references are presented in terms of Eastings and Northings, which are distances in metres (east and north, respectively) from the origin (0,0), which lies to the west of the Scilly Isles. Each grid reference is given a positional quality indicator to denote the accuracy of the grid reference. In the majority of cases, the assigned grid reference relates to the building of the matched address closest to the postcode mean. The grid references provided for Northern Ireland postcodes use the Irish National Grid system that covers all of Ireland and is independent of the British National Grid. No grid references are provided for postcodes in the Channel Islands and the Isle of Man. The Secure Access version includes all files in the Special Licence version (see SN 6931 for full details), plus a file for each wave that contains four variables relating to the National Grid Reference for each household: easting, northing, positional quality indicator (w_osgrdind), and a variable identifying whether it relates to the British or Irish grid system. The Secure Access version also contains a data file with full dates of birth for Understanding Society and BHPS respondents, which includes the day of...