ONS LSOA code lists and the 2011 to 2021 lookup

The Office for National Statistics lookup between 2011 and 2021 Lower layer Super Output Areas (LSOAs) in England and Wales, with the ONS change indicator, the 2022 local authority district, and a flag marking the single 2021 LSOA that the ONS best-fit lookup assigns to each 2011 LSOA. lamp_lsoa_codes() returns the complete code list for either vintage, which is what lamp_lsoa_vintage() matches against.

Usage

lamp_lsoa_lookup()

lamp_lsoa_codes(vintage = c("lsoa21", "lsoa11"))

Arguments

vintage

Which code list: "lsoa21" (default) or "lsoa11".

Value

lamp_lsoa_lookup() returns a tibble with columns lsoa11, lsoa11_name, lsoa21, lsoa21_name, change (factor), lad22, lad22_name and best_fit. lamp_lsoa_codes() returns a sorted character vector of codes.

Details

lamp_lsoa_lookup() is the ONS exact-fit lookup (version 3): one row per 2011 to 2021 pair, so a 2011 LSOA that was split appears on several rows and a merged 2021 LSOA appears on several rows. change is the ONS change indicator: U unchanged, S split, M merged, X complex. best_fit is TRUE on the row chosen by the ONS best-fit lookup (version 2), which assigns every 2011 LSOA to exactly one 2021 LSOA; re-vintaging counts with the best_fit rows is deterministic but leaves the 2021 LSOAs that no 2011 LSOA best-fits to without data.

Source: Office for National Statistics licensed under the Open Government Licence v3.0. Retrieved 2026-09-16; see inst/NOTES/data_sources.md.

See also

Other bundled data: lamp_area_lookup(), lamp_bank_holidays(), lamp_crime_types(), lamp_deprivation(), lamp_forces(), lamp_outcome_types(), lamp_sample_panel(), lamp_shocks()

Examples

length(lamp_lsoa_codes("lsoa21"))
#> [1] 35672
length(lamp_lsoa_codes("lsoa11"))
#> [1] 34753
table(lamp_lsoa_lookup()$change)
#> 
#>     U     S     M     X 
#> 33647  1900   239    10