E63013524 /South East evidence profile
South East evidence profile
Southampton digital planning profile
Southampton is a major, coastal built-up area in South East. ONS records show a 2021 population of 249,633; the population grew steadily between 2001 and 2021, while the 2015 to 2024 employment series shows a modest employment contraction. 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
- E63013524
- ITL1 region
- South East
- Coastal
- Coastal
- Income-deprivation flag
- Higher deprivation
02 / Context
Three comparisons, with the benchmark stated
3.4% above the 11.2% median across complete England records in this ONS file.
1.7% below the 0% dataset median.
48.9% below 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 98.2 of 100.
Highest decile · percentile position 94.1 of 100.
Lowest decile · percentile position 7.4 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: sha256:44fd40480b9…fbc9d7698c4a
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 Southampton minus the named peer; a plus sign means the value recorded for Southampton is higher.
Regional peer
Portsmouth · E63013748
South East. Nearest complete record in South East. ONS classification: Nearer - Higher deprivation - Working.
- 2021 population
- +26,309 people
- Population change, 2001 to 2021
- +3.4 pp
- Economic inactivity
- -0.4 pp
- Employment change, 2015 to 2024
- -3.6 pp
- 2023 median house price
- -£13,420
- House-price growth, 2001 to 2023
- -35.4 pp
- Population aged under 25
- +1.4 pp
- Population aged 65 or over
- -1.9 pp
Classification peer
Bournemouth · E63013847
South West. Nearest complete record outside South East with the same ONS combined classification. ONS classification: Nearer - Higher deprivation - Working.
- 2021 population
- +53,501 people
- Population change, 2001 to 2021
- -6 pp
- Economic inactivity
- -1.8 pp
- Employment change, 2015 to 2024
- -4.1 pp
- 2023 median house price
- -£53,500
- House-price growth, 2001 to 2023
- -11.5 pp
- Population aged under 25
- +4 pp
- Population aged 65 or over
- -4.2 pp
National peer
Reading · E63012182
South East. Nearest remaining complete England record. ONS classification: Nearer - Medium deprivation - Working.
- 2021 population
- +46,536 people
- Population change, 2001 to 2021
- -2.6 pp
- Economic inactivity
- +4.6 pp
- Employment change, 2015 to 2024
- -20 pp
- 2023 median house price
- -£102,500
- House-price growth, 2001 to 2023
- -4.8 pp
- Population aged under 25
- +1.6 pp
- Population aged 65 or over
- +1.1 pp
05 / Evidence synthesis
Southampton evidence synthesis: 2021 population, Population aged under 25, Population aged 65 or over
Southampton is recorded as a major, 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: 2021 population → Population aged under 25 → Population change, 2001 to 2021 → 2023 median house price → Economic inactivity → Employment change, 2015 to 2024 → House-price growth, 2001 to 2023 → Population aged 65 or over.
Furthest-to-nearest distance from the middle percentile: 2021 population → Population aged under 25 → Population aged 65 or over → House-price growth, 2001 to 2023 → Employment change, 2015 to 2024 → Economic inactivity → Population change, 2001 to 2021 → 2023 median house price.
Regional peer
2021 population: 249,633 · Portsmouth delta +26,309 people
At 249,633, 2021 population places Southampton in the highest decile and at percentile 98.2 of the reviewed distribution. The same-source regional check uses Portsmouth, classified as Nearer - Higher deprivation - Working. The Southampton-minus-Portsmouth delta on this metric is +26,309 people. 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. This remains contextual evidence—population size does not establish addressable demand.
Classification peer
Population aged under 25: 34.1% · Bournemouth delta +4 pp
Population aged under 25 is one of Southampton's three furthest-from-middle observations: 34.1%, percentile 94.1, highest decile. For a bounded comparison rather than a national average, Bournemouth supplies the classification reference; Southampton is +4 pp from it on the displayed scale. For planning, document the observation beside mobile task speed, privacy explanation and channel continuity and require cross-device usability sessions without age-based assumptions before treating the idea as an accepted requirement. This remains contextual evidence—an age-group share does not determine channel preference.
National peer
Population aged 65 or over: 13.8% · Reading delta +1.1 pp
Southampton's population aged 65 or over is 13.8%, a lowest decile result at percentile 7.4 among 936 complete England records. The same-source national check uses Reading, classified as Nearer - Medium deprivation - Working. The Southampton-minus-Reading delta on this metric is +1.1 pp. Treat this combination as a hypothesis about readability, keyboard access and assisted alternatives, and test it through inclusive usability sessions and accessibility conformance checks. No user or market conclusion follows automatically; an age-group share does not determine digital ability.
Southampton's evidence pattern combines the major, coastal, working built-up area, nearer to a major town or city frame with three percentile observations and peer-specific deltas. That combination can make discovery more precise, but it cannot establish what residents want or whether a service has local demand. Decisions should remain reversible until direct research or measured website behaviour confirms them.
06 / Evidence interpretation
Planning signals before design decisions
Population context: 249,633 people in 2021
Southampton's recorded population changed from 217,837 in 2001 to 249,633 in 2021 (+14.6%). 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: 13.8% aged 65 or over
The 2021 age-group series records 44,665 people aged 0 to 15, 40,504 aged 16 to 24, 130,071 aged 25 to 64 and 34,427 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: 38.1% economically inactive
ONS records economic inactivity at 38.1%. The published composition includes 15.6% retired, 4.2% long-term sick or disabled, 10.6% students and 4.7% looking after home or family. These categories support inclusive task design; they do not identify individual users or purchasing intent.
Economic context: £247,500 median house price in 2023
The median house-price series moved from £89,950 in 2001 to £234,000 in 2021 and £247,500 in 2023, a published change of +175.2%. 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
Before prioritising content hierarchy and service-capacity assumptions, which part of task-frequency interviews and observed completion data would verify whether this 2021 population observation matters to users in Southampton?
Portsmouth is the constrained regional reference and is classified as Nearer - Higher deprivation - Working; the question keeps population size does not establish addressable demand as an explicit limit.
- 02
Before prioritising mobile task speed, privacy explanation and channel continuity, which part of cross-device usability sessions without age-based assumptions would verify whether this population aged under 25 observation matters to users in Southampton?
Bournemouth is the constrained classification reference and is classified as Nearer - Higher deprivation - Working; the question keeps an age-group share does not determine channel preference as an explicit limit.
- 03
What evidence would show that the population aged 65 or over contrast between Southampton and Reading should alter readability, keyboard access and assisted alternatives, rather than remain background context?
Evidence basis: 13.8%, lowest decile, with Southampton minus the national peer equal to +1.1 pp. Validation route: inclusive usability sessions and accessibility conformance checks.
- 04
For Southampton's major, coastal, working built-up area, nearer to a major town or city classification, how should 2021 population, population aged under 25, 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—Portsmouth, Bournemouth, Reading—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
Southampton 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
Southampton 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
34.1% 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
Southampton recorded +14.6% population change from 2001 to 2021 and -1.7% 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 E63013524. 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 Southampton.
Mosalio does not claim an office, staff member, customer, or physical-delivery presence in Southampton.
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.