Title: Multiple ethnic group
Description: This dataset provides Census 2021 estimates that classify households in England and Wales by the diversity in ethnic group of household members in different relationships. The estimates are as at Census Day, 21 March 2021.
Issued: 2022-11-29T00:00:00.000Z
Next Release: 
Identifier: Multiple ethnic group
Keywords: [ltla hh_multi_ethnic_group]
Language: English
Contact: Michael Roskams, census.customerservices@ons.gov.uk, +44 1329 444972
Latest Changes: []
Periodicity: 
Distribution:
	Extension: txt
	Size: 3498
	URL: https://download.publishing.publishing.onsdigital.co.uk/downloads/datasets/TS023/editions/2021/versions/1.txt

	Extension: csv
	Size: 138913
	URL: https://download.ons.gov.uk/downloads/datasets/TS023/editions/2021/versions/1.csv

	Extension: csvw
	Size: 2474
	URL: https://download.publishing.publishing.onsdigital.co.uk/downloads/datasets/TS023/editions/2021/versions/1.csv-metadata.json

	Extension: xls
	Size: 53910
	URL: https://download.publishing.ons.gov.uk/downloads/datasets/TS023/editions/2021/versions/1.xlsx

Unit of measure: Household
License: 
National Statistic: false
Canonical Topic: 
Survey: 
Usage Notes:
Version: 1

Area Type

Census 2021 statistics are published for a number of different geographies.
These can be large, for example the whole of England, or small, for example
an output area (OA), the lowest level of geography for which statistics are
produced.

For higher levels of geography, more detailed statistics can be produced.
When a lower level of geography is used, such as output areas (which have
a minimum of 100 persons), the statistics produced have less detail. This is
to protect the confidentiality of people and ensure that individuals or their
characteristics cannot be identified.


Coverage

Census 2021 statistics are published for the whole of England and Wales.
However, you can choose to filter areas by:

- country - for example, Wales
- region - for example, London
- local authority - for example, Cornwall
- health area – for example, Clinical Commissioning Group
- statistical area - for example, MSOA or LSOA


Protecting personal data

Sometimes we need to make changes to data if it is possible to identify
individuals. This is known as statistical disclosure control.

In Census 2021, we:
- swapped records (targeted record swapping), for example, if a household 
  was likely to be identified in datasets because it has unusual
  characteristics, we swapped the record with a similar one from a nearby
  small area (very unusual households could be swapped with one in a nearby
  local authority)
- added small changes to some counts (cell key perturbation), for example,
  we might change a count of four to a three or a five – this might make
  small differences between tables depending on how the data are broken down
  when we applied perturbation

Read more in Section 5 of our article Design for Census 2021.

Dimensions:

	ID: ltla

	Label: Lower Tier Local Authorities

	Description: Lower tier local authorities provide a range of local services. In England there are 309 lower tier local authorities. These are made up of non-metropolitan districts (181), unitary authorities (59), metropolitan districts (36) and London boroughs (33, including City of London). In Wales there are 22 local authorities made up of 22 unitary authorities. Of these local authority types, only non-metropolitan districts are not additionally classified as upper tier local authorities.

	Number Of Options: 331

	Quality Statement: 


	ID: hh_multi_ethnic_group

	Label: Multiple ethnic groups in household (6 categories)

	Description: Classifies households by whether members identify as having the same or different ethnic groups. 

If multiple ethnic groups are present, this identifies whether they differ between generations or partnerships within the household.

	Number Of Options: 6

	Quality Statement: 

