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ONS 2011 Census Wales (CENW)

Population Size

3,100,000

People

Population Size statistic card

Years

2011 - 2011

Years statistic card

Associated BioSamples

None/not available

Associated BioSamples statistic card

Geographic coverage

United Kingdom

Wales

Geographic coverage statistic card

Lead time

2-6 months

Lead time statistic card

Summary

A census in the UK is a count of all people and households. This census in the UK was held on 27 March 2011.

Documentation

Every ten years since 1801 the nation has set aside one day for the census - a count of all people and households. It is the most complete source of information about the population that we have. The latest census was held on Sunday 27 March 2011.

Every effort is made to include everyone, and that is why the census is so important. It is the only survey which provides a detailed picture of the entire population, and is unique because it covers everyone at the same time and asks the same core questions everywhere. This makes it easy to compare different parts of the country.

The information the census provides allows central and local government, health authorities and many other organisations to target their resources more effectively and to plan housing, education, health and transport services for years to come.

In England and Wales, the census is planned and carried out by the Office for National Statistics. Elsewhere in the UK, responsibility lies with the National Records of Scotland and the Northern Ireland Statistics and Research Agency.

All 2011 Census data for ‘Welsh’ records are defined as those:

  • Currently resident in Wales
  • With a second address in Wales
  • With a previous Years Address in Wales
  • With a term-time address in Wales
  • Who work in Wales (but live in England)
  • In Armed Forces Establishments in Wales
  • Who are visitors in Wales
  • Who are Welsh language speakers (including those who live and work outside of Wales).

The ONS have three processes for checking and resolving duplicate responses so that the main census data should simply be one record for each person:

  1. The ONS resolve duplicates coming in for the same postcode using a process called Resolve Multiple Responses (RMR). For instance, if two people both fill in a form for their whole household, or someone from a household also submits an individual response unknown to the main submission. They have rules for checking they are duplicates, and rules for which to keep.

  2. The ONS also do an over coverage check on a sample basis for duplicates across the rest of the country, and then factor the findings into their coverage estimation calculations. This sampling focuses on the types of population which are more likely to be duplicated (people who have indicated they have a second residence on the census, students aged 18-25, armed forces personnel, children, adults enumerated at a communal establishment, etc.) but also samples from the remaining population.

  3. The ONS ask parents to fill in basic demographic information for any children who are away studying, and when they get to the question on their term-time address, if they answer that the term-time address is elsewhere, we then use that to filter those out-of-term students out of the main database. Then when that student does respond actually at their term-time address, they only include them there.

Variables RELAT06, RELAT11, RELAT16, RELAT21, RELAT26 are not available in the data

Dataset type

Health and disease

Dataset sub-type

Not applicable

Dataset population size

3100000

Keywords

Observations

Observed Node

Disambiguating Description

Measured Value

Measured Property

Observation Date

Persons

3100000

Count

18 Sep 2011

Provenance

Purpose of dataset collection

Administrative

Source of data extraction

Other

Collection source setting

Community, Home, Other

Image contrast

Not stated

Biological sample availability

None/not available

Structural Metadata

Details

Publishing frequency

Other

Version

1.0.0

Modified

08/10/2024

Distribution release date

27/03/2011

Citation Requirements

Office for National Statistics

Coverage

Start date

27/03/2011

End date

27/03/2011

Time lag

2-6 months

Geographic coverage

United Kingdom, Wales

Maximum age range

120

Follow-up

Unknown

Accessibility

Language

en

Controlled vocabulary

LOCAL

Format

SQL database table

Data Access Request

Dataset pipeline status

Available

Time to dataset access

2-6 months

Access request cost

Data provision is free from SAIL. Overall project costing depends on the number of people that require access to the SAIL Gateway, the activities that SAIL needs to complete (e.g. loading non-standard datasets), data refreshes, analytical work required, disclosure control process, and special case technological requirements.

Access method category

TRE/SDE

Access service description

The SAIL Databank is powered by the UK Secure e-Research Platform (UKSeRP). Following approval through safeguard processes, access to project-specific data within the secure environment is permitted using two-factor authentication.

Jurisdiction

GB-WLS

Data use limitation

Research-specific restrictions

Data use requirements

Project-specific restrictions

Data Controller

Office for National Statistics

Data Processor

SAIL Databank

Dataset Types: Health and disease


Collection Sources: Community, Home, Other

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