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Liverpool Built-up Area
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The Liverpool Built-up Area (previously Liverpool Urban Area in 2001 and prior) is a term used by the Office for National Statistics (ONS) to denote the urban area around Liverpool in England, to the east of the River Mersey. The contiguous built-up area extends beyond the area administered by Liverpool City Council into adjoining local authority areas, particularly parts of Sefton and Knowsley. As defined by ONS, the area extends as far east as St Helens, Haydock, and Ashton-in-Makerfield in Greater Manchester.[1][2]
The Liverpool Urban Area is not the same area as Merseyside (or the Liverpool City Region sometimes informally referred to as Greater Merseyside), which includes areas of Wirral on the west bank of the Mersey and Southport.[1] The western extent of the Greater Manchester conurbation is narrowly avoided as that extends as far as Golborne and Newton-le-Willows, with small gaps separating those towns from Ashton-In-Makerfield and Haydock.
Settlements
[edit]The Liverpool Urban Area defined by ONS covers Liverpool and its contiguous built-up areas, with a population of 864,122[3] a considerable increase from the 2001 census due to the rapid growth in the population of Liverpool during this period. The population of the area was 816,216 in the 2001 census,.[4] The urban area facing Liverpool on the Wirral Peninsula is a separate division known as the Birkenhead Urban Area.[5]
The ONS definition is based purely on physical criteria with a focus on the presence or absence of significant gaps between built-up areas. It therefore extends as far as Ashton-in-Makerfield, but excludes some areas much closer to Liverpool which are separated from it by open spaces, notably Kirkby with a narrow gap along the M57 motorway, and Maghull.
Subdivisions are not always aligned to present administrative or county borders. For example, Liverpool as designated by the ONS also containing the towns Huyton, Roby, and Halewood which are all within the neighbouring borough of Knowsley. St Helens only covers the settlement, and not the St Helens borough which contains Rainford and Haydock.
According to the ONS, the subcomponents of the Liverpool Urban Area are:
| Urban subvision | Population (2011)[3] | Population (2001)[4] | Population (1991)[1] | Population (1981)[6] |
|---|---|---|---|---|
| Liverpool | 552,267 | 469,017 | 481,786 | 538,809 |
| St Helens | 102,885 | 102,629 | 106,293 | - |
| Bootle | 51,394 | 59,123 | 65,454 | 70,860 |
| Huyton-with-Roby | - | 54,766 | 56,500 | 62,011 |
| Crosby | 50,044 | 51,789 | 52,869 | 54,103 |
| Prescot | 37,911 | 39,695 | 37,486 | - |
| Ashton-in-Makerfield | 28,762 | - | - | - |
| Litherland | 18,507 | 22,242 | 20,905 | 21,989 |
| Haydock | 16,521 | 16,955 | 16,705 | - |
| Rainford | 5,831 | - | - | - |
| Total | 864,122 | 816,216 | 837,998 | 747,772 |
Notes:
- Huyton-with-Roby was included as part of the Liverpool subdivision in the 2011 census.
- Rainford and Ashton-in-Makerfield were not part of the Liverpool Urban Area prior to 2011.
Greater Liverpool
[edit]Greater Liverpool is an informal term used by the Rent Service as one of its Broad Rental Market Areas (BRMA).[7] This area includes such districts outside the Liverpool City Council boundaries as Crosby, Maghull, Prescot and St Helens.
Merseytravel include a similar Greater Liverpool area for its Public Transport Map and Guide as seen on its Liverpool area map.[8]
References
[edit]- ^ a b c "Liverpool Urban Area". Office for National Statistics. Retrieved 30 June 2008.
- ^ "2011 Liverpool Built-up Area Area". Office for National Statistics. Retrieved 25 October 2017.
- ^ a b "2011 Census - Built-up areas". ONS. Retrieved 29 June 2013.
- ^ a b "Key Statistics for urban areas in the North - Contents, Introduction, Tables KS01 - KS08" (PDF). Office for National Statistics. Archived from the original (PDF) on 27 March 2009. Retrieved 30 June 2008.
- ^ "Birkenhead Urban Area". Office for National Statistics. Retrieved 30 June 2008.
- ^ Census 1981 : key statistics for urban areas : the North, cities and towns. Great Britain. Office of Population Censuses and Surveys. London: H.M.S.O. 1984. ISBN 0116910615. OCLC 10979725.
{{cite book}}: CS1 maint: others (link) - ^ Broad Rental Market Areas[permanent dead link] (select 'Liverpool' as the Local Authority and hit LA Search - then hit the 'Map' button at the bottom to give map)
- ^ Liverpool Area Public Transport Map and Guide
Liverpool Built-up Area
View on GrokipediaIntroduction
Definition and Scope
The Liverpool Built-up Area is a statistical designation used by the Office for National Statistics (ONS) to delineate the contiguous urban extent centered on the city of Liverpool, serving as a measure of physical urban development for census and demographic analysis.[2] Built-up areas, as defined by the ONS, consist of land that is irreversibly urban in character and characteristic of settlements such as villages, towns, or cities; they are identified using Ordnance Survey topographic data to map the physical built environment, excluding consideration of administrative, political, or land use boundaries.[1] The methodology emphasizes physical contiguity, grouping built structures that are no more than 200 meters apart into a single area, provided the overall extent covers at least 20 hectares of developed land; this approach ensures the designation captures functional urban units based on actual built form rather than functional economic or travel-to-work patterns.[7] Unlike broader concepts such as metropolitan areas or city regions—which incorporate commuting patterns, economic interdependencies, and administrative groupings—the Liverpool Built-up Area strictly represents a cohesive urban footprint east of the River Mersey, focusing on immediate physical adjacency without extending to functionally linked but non-contiguous territories.[2] The official nomenclature evolved from "Liverpool Urban Area," as used in the 2001 Census, to "Liverpool Built-up Area" starting with the 2011 Census, reflecting a refined emphasis on built environment criteria across ONS geographies. For the 2021 Census, the ONS further refined the methodology using updated Ordnance Survey data and automated processes, resulting in a new delineation of built-up areas that is not directly comparable to 2011 boundaries; the previous larger area was split into several distinct built-up areas. The current (2021) Liverpool Built-up Area has a population of 506,565 and covers approximately 110.5 km², primarily encompassing the City of Liverpool and contiguous urban zones in adjacent Sefton (such as Bootle) within Merseyside.[1][3]Historical Context of the Term
The term "Liverpool Urban Area" emerged in the mid-20th century as part of the Office for National Statistics (ONS) and its predecessors' efforts to classify contiguous urban settlements for census purposes, with delineations first appearing in the 1951 census to capture the expansive conurbations formed by industrial-era growth.[8] These early definitions focused on "bricks and mortar" land use, identifying areas of at least 20 hectares with 1,500 or more residents, reflecting the physical coalescence of towns and suburbs around Liverpool driven by 19th-century port expansion and 20th-century industrial and residential sprawl.[9] Liverpool's population surge from 78,000 in 1801 to over 850,000 by the early 20th century, fueled by trade, migration, and manufacturing, directly shaped these initial boundaries, incorporating adjacent districts like Bootle, St Helens, and Southport into a unified statistical entity.[10] This terminology persisted through subsequent censuses, including 1961, 1971, 1981, 1991, and 2001, where the Liverpool Urban Area was consistently used to denote the built environment's extent without significant methodological overhauls until the early 2000s.[9] In the 2001 census, the area encompassed a population of 816,216, highlighting its status as one of England's largest urban agglomerations amid ongoing post-industrial adjustments like suburbanization and deindustrialization. The delineations accounted for the legacy of 19th- and 20th-century expansions, such as dock-related infrastructure and housing developments, which blurred municipal lines and necessitated aggregated statistical units for planning and analysis.[11] A pivotal shift occurred with the 2011 census, when the ONS renamed the concept "built-up area" to enhance consistency with rural-urban classifications and address ambiguities in prior "urban area" usage, which had sometimes overlapped with administrative or functional definitions.[2] This change coincided with an updated methodology incorporating automated mapping via satellite imagery from the Land Cover Map 2000, Ordnance Survey MasterMap topographical data, and targeted ground surveys to more precisely identify "irreversibly urban" land—areas of continuous built structures separated by less than 200 meters.[2] The resulting Liverpool Built-up Area recorded a population of 864,100, capturing expansions from the 2001 boundaries while maintaining focus on physical contiguity rather than socioeconomic ties.[2] The 2021 Census introduced additional refinements to the built-up area definitions, using more recent Ordnance Survey and satellite data, leading to a redefined Liverpool Built-up Area with a population of 506,565 as of 2021. This underscores the ongoing evolution of statistical geographies in response to urban dynamics, with detailed population trends covered in subsequent sections.[1][3]Geography and Extent
Boundaries and Composition
The Liverpool Built-up Area, as delineated by the Office for National Statistics (ONS) for the 2021 Census, primarily encompasses the metropolitan borough of Liverpool and contiguous urban zones in adjacent portions of Sefton and Knowsley, extending northeastward through Knowsley, northward to areas including Crosby and Litherland in Sefton, while excluding the Wirral Peninsula, all territories west of the River Mersey, St Helens, and Ashton-in-Makerfield.[4] This built-up area incorporates the complete metropolitan borough of Liverpool along with partial areas of Sefton and Knowsley. The 2021 delineation reflects updates to the ONS methodology, using refined Ordnance Survey MasterMap topographical layers and satellite imagery to identify 'irreversibly urban' land parcels of at least 20 hectares with no more than 200 meters separation between built elements, resulting in more precise boundaries compared to 2011.[1][2] As delineated by the ONS for the 2021 Census, the total spatial extent measures approximately 110.5 km².[4]Physical and Urban Features
The Liverpool Built-up Area occupies a low-lying, gently rolling platform on the Merseyside Plain, characterized by subtle sandstone ridges and flat terrain shaped by glacial deposits and fluvial processes.[12] Elevations range from sea level along the coastal and estuarine margins to approximately 80 meters in the eastern extents, with the urban core averaging around 20-30 meters above sea level.[13] The River Mersey forms a significant natural boundary along the eastern and southern edges, its tidal estuary creating deep channels, mudflats, and sandbanks that influence local hydrology and constrain development in low-lying zones.[12] Key physical features include the River Mersey and its tributaries, such as the River Alt, alongside artificial waterways like the Leeds and Liverpool Canal, which extends 127 miles from Leeds into Liverpool's urban core via the modern Liverpool Canal Link, historically linking to the Mersey Docks for trade and now supporting leisure navigation.[14] Green spaces punctuate the landscape, exemplified by Sefton Park, a 235-acre Grade I listed historic park featuring woodlands, lakes, caves, waterfalls, statues, and recreational facilities that provide vital urban respite.[15] The built environment reflects a dense urban fabric dominated by red-brick Victorian terraced housing from the 19th century, designed in compact rows with bay windows and classical detailing to accommodate the city's industrial workforce.[16] Post-war redevelopment introduced peripheral estates of semi-detached and low-rise housing, often in Radburn-style layouts with homes facing green spaces rather than roads, built to address slum clearance in areas like Bootle and Litherland.[17] Former commercial docks, once central to maritime industry, have undergone extensive redevelopment into mixed-use zones with modern warehousing, residential, and leisure facilities, while transport corridors like the M62 motorway and Merseyrail lines facilitate connectivity across the conurbation.[12] Environmental challenges include the urban heat island effect, where built-up surfaces in the densely urbanized core elevate temperatures by 2-5°C compared to rural surroundings, exacerbating summer heat stress.[18] Flood risks are prominent due to the area's proximity to the Mersey Estuary and low elevations, with tidal surges and heavy rainfall posing threats to coastal and riverside zones; ongoing initiatives employ sustainable drainage and natural flood management to mitigate overflows and protect infrastructure.[19]Demographics
Population Statistics
The Liverpool Built-up Area, as defined by the Office for National Statistics (ONS) using 2021 Census boundaries, had a population of 506,565.[1] This represents a modest increase of 0.42% from the 2011 figure under the revised boundaries (approximately 504,500, though direct comparisons are limited due to changes in the ONS definition from 'Urban Area' to 'Built-up Area,' which reduced the covered area). Prior to 2021, the larger Liverpool Urban Area recorded populations of 816,216 in 2001 and 864,122 in 2011 across about 200 km².[2] The following table summarizes key census populations, noting boundary changes:| Year | Population | Area (km²) | Notes |
|---|---|---|---|
| 2001 | 816,216 | ~200 | Urban Area definition |
| 2011 | 864,122 | 199.6 | Urban Area definition |
| 2021 | 506,565 | 110.5 | Built-up Area definition; core urban zone |