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Hidden & Transient Populations

Small-area estimates of hidden and transient population sub-groups

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Hidden and Transient (H&T) populations are not captured within the official ‘usually-resident’ population estimates produced by the Office for National Statistics (ONS).

 

This includes:

  • People living at secondary addresses

  • Visitors and tourists

  • Irregular migrants (i.e. people in the UK without legal residence)

These groups tend to be ‘hidden’ in their nature or have a relatively short-term and ‘transient’ impact upon local populations. For a range of sectors, these H&T populations can have a substantial permanent or seasonal uplift on the populations of an area. 

Using evidence from a mix of Census, survey and administrative sources, plus published academic research, the H&T Population Model provides ‘Low’, ‘Medium’, and ‘High’ H&T population estimates for output areas in England and Wales, which can be aggregated to bespoke geographies.

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