For the purposes of official statistics, parliamentary constituencies are the geographical areas in which voters elect candidates to represent them. Parliamentary constituencies, whether for the Westminster Parliament or the devolved legislatures, typically will not have the same boundaries as the standard administrative areas such as local authorities. However this does not prevent the production of official statistics for constituency areas. These are typically produced using estimation techniques that ensure the estimates for constituencies are consistent with the existing published statistics for surrounding areas. Whilst this is not an exact process, it is a well established one.
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