The ONS coding system was a hierarchical code used in the United Kingdom for tabulating census and other statistical data. ONS refers to the Office for National Statistics.
It was replaced by the GSS coding system on 1 January 2011.
Principal authorities
The code was constructed top down from a four character code representing a unitary authority or two-tier county and district.
00EC |
Middlesbrough (unitary)
|
or
|
12 |
Cambridgeshire county
|
12UB |
Cambridge district
|
Electoral wards and output areas
Local government wards had a two-letter code within their local authority, and census output area an additional four digits within a ward.
12UB |
Cambridge district
|
12UBGA |
Petersfield ward
|
12UBGA0001 |
Output area: Gwydir Street (north of junction with Hooper St)
|
The authority and ward codes were recognised by Eurostat as local administrative unit code levels 1 and 2 within the NUTS system.
Civil parishes
An overlapping system encoded civil parish areas. Parishes were represented by an additional three digits within their local authority:
12UD |
Fenland district
|
12UD010 |
Tydd St. Giles parish
|
List of codes for counties and districts
The codes for counties and districts were as follows.[1]
Also showing NUTS(3) codes thus: (UKH12)
Greater London
These codes became active following local government changes in 1986.
Metropolitan counties
These codes became active following local government changes in 1986.
Non-hierarchical codes for Greater London and metropolitan counties
Unitary authorities established in the 1990s
These codes became active following local government changes the 1990s.
Unitary authorities established in 2009
These codes became active following local government changes in 2009.
00KB
Bedford
00KC
Central Bedfordshire
00EQ
Cheshire East
00EW
Cheshire West and Chester
00HE
Cornwall
00HF
Isles of Scilly
00EJ
County Durham
00EM
Northumberland
00GG
Shropshire
00HY
Wiltshire
Non-metropolitan counties
Wales
These codes became active following local government changes in 1996.
Scotland
These codes became active following local government changes in 1996.
Northern Ireland
References
External links