E63007969 /North West evidence profile
North West evidence profile
Blackburn (Blackburn with Darwen) digital planning profile
Blackburn (Blackburn with Darwen) is a large, non-coastal built-up area in North West. ONS records show a 2021 population of 124,958; the population expanded quickly between 2001 and 2021, while the 2015 to 2024 employment series shows strong employment expansion. This profile turns those public observations into a reviewable website-planning brief without claiming that the figures measure searches, leads or Mosalio's physical presence.
01 / Data snapshot
What the reviewed source records
- BUA24 code
- E63007969
- ITL1 region
- North West
- Coastal
- Non-coastal
- Income-deprivation flag
- Higher deprivation
02 / Context
Three comparisons, with the benchmark stated
4% above the 11.2% median across complete England records in this ONS file.
12.7% above the 0% dataset median.
9% above the 224.1% dataset median.
These medians use every complete England record accepted from the same ONS file. They are descriptive context, not targets, forecasts or a national demand model.
03 / Distinctive pattern
Where this record sits within 936 complete England profiles
Highest decile · percentile position 96.6 of 100.
Highest decile · percentile position 95.1 of 100.
Lowest decile · percentile position 6.9 of 100.
These are the three values furthest from the middle percentile position for this record. A higher position means a higher published value, not a better outcome or evidence of search demand.
Evidence fingerprint: sha256:b83aab4d6f1…9a3001219b2b
04 / Constrained peers
Three named comparisons from the same reviewed source
Each peer is selected from all 936complete England records using the documented eight-metric distance. Deltas are Blackburn (Blackburn with Darwen) minus the named peer; a plus sign means the value recorded for Blackburn (Blackburn with Darwen) is higher.
Regional peer
Lancaster · E63007656
North West. Nearest complete record in North West. ONS classification: Further - Higher deprivation - Mixed.
- 2021 population
- +72,312 people
- Population change, 2001 to 2021
- +3.2 pp
- Economic inactivity
- +0.3 pp
- Employment change, 2015 to 2024
- +3.6 pp
- 2023 median house price
- -£22,750
- House-price growth, 2001 to 2023
- +19.9 pp
- Population aged under 25
- -0.3 pp
- Population aged 65 or over
- -0.8 pp
Classification peer
Lincoln · E63008729
East Midlands. Nearest complete record outside North West with the same ONS combined classification. ONS classification: Nearer - Higher deprivation - Working.
- 2021 population
- +20,405 people
- Population change, 2001 to 2021
- -8 pp
- Economic inactivity
- +2.3 pp
- Employment change, 2015 to 2024
- +3.6 pp
- 2023 median house price
- -£36,750
- House-price growth, 2001 to 2023
- -26.9 pp
- Population aged under 25
- -0.9 pp
- Population aged 65 or over
- -0.8 pp
National peer
Bolton (Bolton) · E63008201
North West. Nearest remaining complete England record. ONS classification: Nearer - Higher deprivation - Mixed.
- 2021 population
- -59,660 people
- Population change, 2001 to 2021
- -0.5 pp
- Economic inactivity
- +0.2 pp
- Employment change, 2015 to 2024
- +4.4 pp
- 2023 median house price
- -£26,750
- House-price growth, 2001 to 2023
- -28.6 pp
- Population aged under 25
- +1.9 pp
- Population aged 65 or over
- -2.3 pp
05 / Evidence synthesis
Blackburn (Blackburn with Darwen) evidence synthesis: Population aged under 25, 2021 population, Population aged 65 or over
Blackburn (Blackburn with Darwen) is recorded as a large, non-coastal, working built-up area, nearer to a major town or city. This classification sets a transparent frame for the three observations below; it is not a persona, a service-area promise or proof of local search demand. Each finding pairs one distinctive percentile measure with one independently selected peer and one explicit validation route.
Eight-metric evidence matrix
The matrix shows every measure used by the peer-distance method, not only the three most distinctive values. Direction describes the published value relative to the middle percentile position; it is not a positive or negative judgement.
Highest-to-lowest percentile order: Population aged under 25 → 2021 population → Economic inactivity → Employment change, 2015 to 2024 → Population change, 2001 to 2021 → House-price growth, 2001 to 2023 → 2023 median house price → Population aged 65 or over.
Furthest-to-nearest distance from the middle percentile: Population aged under 25 → 2021 population → Population aged 65 or over → 2023 median house price → Economic inactivity → Employment change, 2015 to 2024 → Population change, 2001 to 2021 → House-price growth, 2001 to 2023.
Regional peer
Population aged under 25: 35.9% · Lancaster delta -0.3 pp
Population aged under 25 is one of Blackburn (Blackburn with Darwen)'s three furthest-from-middle observations: 35.9%, percentile 96.6, highest decile. The same-source regional check uses Lancaster, classified as Further - Higher deprivation - Mixed. The Blackburn (Blackburn with Darwen)-minus-Lancaster delta on this metric is -0.3 pp. Its practical use is to frame—not answer—a question about mobile task speed, privacy explanation and channel continuity; the next evidence should come from cross-device usability sessions without age-based assumptions. It must not be over-read, because an age-group share does not determine channel preference.
Classification peer
2021 population: 124,958 · Lincoln delta +20,405 people
For 2021 population, the source reports 124,958 for Blackburn (Blackburn with Darwen). That sits in the highest decile, 45.1 percentile points from the middle position. Lincoln, the named classification peer from East Midlands, differs by +20,405 people when the calculation is Blackburn (Blackburn with Darwen) minus peer. Nearest complete record outside North West with the same ONS combined classification. This evidence can narrow a discovery question around content hierarchy and service-capacity assumptions, while task-frequency interviews and observed completion data supplies the user-level check the aggregate data cannot provide. No user or market conclusion follows automatically; population size does not establish addressable demand.
National peer
Population aged 65 or over: 13.6% · Bolton (Bolton) delta -2.3 pp
Among the eight reviewed measures, population aged 65 or over stands out for Blackburn (Blackburn with Darwen) at 13.6%; its percentile position is 6.9 and its band is lowest decile. Using Bolton (Bolton) as the national peer, the profile-minus-peer delta is -2.3 pp; the peer was selected because nearest remaining complete england record. A defensible brief can turn the pair into a verification task for readability, keyboard access and assisted alternatives, using inclusive usability sessions and accessibility conformance checks before changing the information architecture. It must not be over-read, because an age-group share does not determine digital ability.
The distinctive metrics are not interchangeable: population aged under 25, 2021 population, population aged 65 or over each raise a different planning question when read beside Lancaster, Lincoln, Bolton (Bolton). For Blackburn (Blackburn with Darwen), the safe next step is therefore three small verification tasks rather than one demographic persona, locality claim or generic area-page conclusion.
06 / Evidence interpretation
Planning signals before design decisions
Population context: 124,958 people in 2021
Blackburn (Blackburn with Darwen)'s recorded population changed from 108,424 in 2001 to 124,958 in 2021 (+15.2%). This historical direction can inform content governance and capacity planning, but it is not a forecast and does not establish demand for a particular service.
Audience context: 13.6% aged 65 or over
The 2021 age-group series records 29,778 people aged 0 to 15, 15,086 aged 16 to 24, 63,057 aged 25 to 64 and 16,975 aged 65 or over. Small differences from the headline population reflect the published source series; percentages here use the age-group total and should guide testing questions, not stereotypes.
Activity context: 44% economically inactive
ONS records economic inactivity at 44%. The published composition includes 16.9% retired, 6.6% long-term sick or disabled, 7.1% students and 9% looking after home or family. These categories support inclusive task design; they do not identify individual users or purchasing intent.
Economic context: £143,250 median house price in 2023
The median house-price series moved from £43,000 in 2001 to £140,000 in 2021 and £143,250 in 2023, a published change of +233.1%. It is contextual evidence only—not a current affordability, revenue or customer-value estimate.
07 / Independent question set
Questions this evidence cannot answer on its own
These questions convert the profile-specific observations into falsifiable discovery work. They are not recommendations to create a service, location or page, and each needs direct user or behavioural evidence before it changes a website brief.
- 01
How should a prototype test mobile task speed, privacy explanation and channel continuity without assuming that Blackburn (Blackburn with Darwen)'s percentile 96.6 position predicts an individual user's needs?
Lancaster is the constrained regional reference and is classified as Further - Higher deprivation - Mixed; the question keeps an age-group share does not determine channel preference as an explicit limit.
- 02
How should a prototype test content hierarchy and service-capacity assumptions without assuming that Blackburn (Blackburn with Darwen)'s percentile 95.1 position predicts an individual user's needs?
Lincoln is the constrained classification reference and is classified as Nearer - Higher deprivation - Working; the question keeps population size does not establish addressable demand as an explicit limit.
- 03
Where should the team record uncertainty when using Blackburn (Blackburn with Darwen)'s population aged 65 or over value and the Bolton (Bolton) comparison to discuss readability, keyboard access and assisted alternatives?
This question is traceable to population aged 65 or over at percentile 6.9 and a -2.3 pp profile-minus-peer difference, not to inferred local behaviour.
- 04
For Blackburn (Blackburn with Darwen)'s large, non-coastal, working built-up area, nearer to a major town or city classification, how should population aged under 25, 2021 population, population aged 65 or over be tested as separate website hypotheses without turning the combined pattern into a claim about local demand?
Cross-check all three named comparisons—Lancaster, Lincoln, Bolton (Bolton)—and define a user-research or behavioural measure for each question before changing navigation, page scope or conversion paths. The observations share one source but do not demonstrate causation.
08 / Practical brief
Website-planning recommendations for this evidence pattern
- 01
Separate employer and customer journeys
Blackburn (Blackburn with Darwen) is classified as a working town. A useful website brief should separate recruitment, procurement and customer tasks, then give each journey its own proof, contact route and success measure instead of forcing every visitor through one generic enquiry page.
- 02
Differentiate from the nearby major centre
Blackburn (Blackburn with Darwen) is nearer to a major town or city. Use specific offer boundaries, proof and response expectations to explain why the organisation is relevant; do not rely on a place-name heading or create a doorway that simply redirects users to a national service page.
- 03
Support quick comparison without hiding detail
35.9% of the recorded 2021 age-group total is under 25. Lead with concise task summaries and responsive performance, while keeping fees, eligibility, privacy and next steps available in the same journey rather than behind a social-only channel.
- 04
Prepare the content model for change
Blackburn (Blackburn with Darwen) recorded +15.2% population change from 2001 to 2021 and +12.7% employment change from 2015 to 2024. Use owned templates, update dates, accountable content roles and measurable conversion events so the site can evolve without publishing unreviewed route permutations.
09 / Method and limits
What this profile can—and cannot—support
This is a Mosalio editorial interpretation of the ONS May 2026 dataset for BUA24 code E63007969. The source periods differ by metric; values are historical, not live. The profile deliberately excludes ONS experimental visitor-to-resident fields and makes no claim about search volume, rankings, customers, a Mosalio office or physical delivery in Blackburn (Blackburn with Darwen).
Mosalio does not claim an office, staff member, customer, or physical-delivery presence in Blackburn (Blackburn with Darwen).
Source: Office for National Statistics, Understanding towns in England and Wales, investigating socioeconomic trends, released . This Mosalio interpretation was first published on and last reviewed on .
Contains public sector information licensed under the Open Government Licence v3.0.
How this page was made: Mosalio applies one documented, deterministic transform to the validated ONS record, calculates the displayed comparisons, and renders the result from source-controlled data. It is an automated public-data resource, not individually commissioned local market research. A portfolio-level editorial-value review checks every profile's source identity, distinctive metrics, peer evidence, synthesis and planning questions before index eligibility can be enabled.
Analysis basis: Midrank percentile across all accepted England records; a higher percentile means a higher published value, not a better outcome. Root-mean-square Euclidean distance across eight clipped robust z-scores; population and 2023 house price are log-transformed before median/MAD scaling.