• The hierarchy of areas relating to national and local government in the UK.

  • Guidance on the different geographies used for results from the 2001, 2011 and 2021 England and Wales Censuses, for analysts and researchers using census data.

  • An overview of the different electoral systems and areas used to elect members to various levels of administration.

  • An overview of the organisation of the National Health Service administration in the 4 countries of the UK.

  • An overview of the 3 NUTS and 2 LAU layers in the UK.

  • Information about the use of postcodes as a geographic reference and the limitations of using postcodes.

  • Other geographic breakdowns that we use to produce statistics.