E63011939 /East of England evidence profile
East of England evidence profile
Southend-on-Sea digital planning profile
Southend-on-Sea is a large, coastal built-up area in East of England. ONS records show a 2021 population of 182,295; the population grew steadily between 2001 and 2021, while the 2015 to 2024 employment series shows a flat employment count. 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
- E63011939
- ITL1 region
- East of England
- Coastal
- Coastal
- Income-deprivation flag
- Higher deprivation
02 / Context
Three comparisons, with the benchmark stated
1.5% above the 11.2% median across complete England records in this ONS file.
in line with the 0% dataset median.
74.7% 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 97 of 100.
Highest decile · percentile position 93.6 of 100.
Middle half · percentile position 72.1 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:f31d6134965…8e33cee5cd5c
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 Southend-on-Sea minus the named peer; a plus sign means the value recorded for Southend-on-Sea is higher.
Regional peer
Letchworth · E63011093
East of England. Nearest complete record in East of England. ONS classification: Nearer - Higher deprivation - Working.
- 2021 population
- +148,302 people
- Population change, 2001 to 2021
- +8.5 pp
- Economic inactivity
- +1.3 pp
- Employment change, 2015 to 2024
- 0 pp
- 2023 median house price
- -£32,500
- House-price growth, 2001 to 2023
- +31.3 pp
- Population aged under 25
- +0.1 pp
- Population aged 65 or over
- -1 pp
Classification peer
Hastings · E63013588
South East. Nearest complete record outside East of England with the same ONS combined classification. ONS classification: Nearer - Higher deprivation - Mixed.
- 2021 population
- +90,491 people
- Population change, 2001 to 2021
- +5.4 pp
- Economic inactivity
- -1.9 pp
- Employment change, 2015 to 2024
- -6.5 pp
- 2023 median house price
- +£55,000
- House-price growth, 2001 to 2023
- +4.4 pp
- Population aged under 25
- +1.3 pp
- Population aged 65 or over
- -1.1 pp
National peer
Sale · E63008463
North West. Nearest remaining complete England record. ONS classification: Nearer - Lower deprivation - Mixed.
- 2021 population
- +119,750 people
- Population change, 2001 to 2021
- +3.4 pp
- Economic inactivity
- +3 pp
- Employment change, 2015 to 2024
- 0 pp
- 2023 median house price
- -£35,000
- House-price growth, 2001 to 2023
- +28.6 pp
- Population aged under 25
- -0.9 pp
- Population aged 65 or over
- +0.8 pp
05 / Evidence synthesis
Southend-on-Sea evidence synthesis: 2021 population, House-price growth, 2001 to 2023, 2023 median house price
Southend-on-Sea is recorded as a large, coastal, mixed 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 → House-price growth, 2001 to 2023 → 2023 median house price → Population aged under 25 → Population change, 2001 to 2021 → Economic inactivity → Population aged 65 or over → Employment change, 2015 to 2024.
Furthest-to-nearest distance from the middle percentile: 2021 population → House-price growth, 2001 to 2023 → 2023 median house price → Employment change, 2015 to 2024 → Population aged 65 or over → Population aged under 25 → Population change, 2001 to 2021 → Economic inactivity.
Regional peer
2021 population: 182,295 · Letchworth delta +148,302 people
Among the eight reviewed measures, 2021 population stands out for Southend-on-Sea at 182,295; its percentile position is 97 and its band is highest decile. Against Letchworth's reviewed regional record, the displayed delta is +148,302 people. That comparator comes from the documented rule: nearest complete record in east of england. Use the contrast to prioritise research into content hierarchy and service-capacity assumptions. A decision should wait for task-frequency interviews and observed completion data. This remains contextual evidence—population size does not establish addressable demand.
Classification peer
House-price growth, 2001 to 2023: 298.8% · Hastings delta +4.4 pp
At 298.8%, house-price growth, 2001 to 2023 places Southend-on-Sea in the highest decile and at percentile 93.6 of the reviewed distribution. The constrained classification comparison is Hastings (E63013588). On this measure, Southend-on-Sea minus that record is +4.4 pp; the selection basis is nearest complete record outside east of england with the same ons combined classification. This evidence can narrow a discovery question around how dated economic context is labelled and maintained, while source-date checks and user tests for interpretation supplies the user-level check the aggregate data cannot provide. Keep the inference narrow: historic price growth cannot support a current revenue claim.
National peer
2023 median house price: £335,000 · Sale delta -£35,000
2023 median house price is one of Southend-on-Sea's three furthest-from-middle observations: £335,000, percentile 72.1, middle half. Using Sale as the national peer, the profile-minus-peer delta is -£35,000; the peer was selected because nearest remaining complete england record. For planning, document the observation beside pricing clarity, qualification steps and expectation setting and require comprehension tests using the organisation's real offer and fees before treating the idea as an accepted requirement. Keep the inference narrow: a median house price is not a household affordability measure.
The distinctive metrics are not interchangeable: 2021 population, house-price growth, 2001 to 2023, 2023 median house price each raise a different planning question when read beside Letchworth, Hastings, Sale. For Southend-on-Sea, 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: 182,295 people in 2021
Southend-on-Sea's recorded population changed from 161,797 in 2001 to 182,295 in 2021 (+12.7%). 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: 19.2% aged 65 or over
The 2021 age-group series records 34,520 people aged 0 to 15, 16,707 aged 16 to 24, 96,136 aged 25 to 64 and 34,983 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: 39.5% economically inactive
ONS records economic inactivity at 39.5%. The published composition includes 22.6% retired, 4.3% long-term sick or disabled, 3.9% students and 5.3% looking after home or family. These categories support inclusive task design; they do not identify individual users or purchasing intent.
Economic context: £335,000 median house price in 2023
The median house-price series moved from £84,000 in 2001 to £325,000 in 2021 and £335,000 in 2023, a published change of +298.8%. 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
Where should the team record uncertainty when using Southend-on-Sea's 2021 population value and the Letchworth comparison to discuss content hierarchy and service-capacity assumptions?
The prompt combines one distinctive metric with the named regional comparator selected by the eight-metric method. It does not treat either record as search, lead or customer evidence.
- 02
Where should the team record uncertainty when using Southend-on-Sea's house-price growth, 2001 to 2023 value and the Hastings comparison to discuss how dated economic context is labelled and maintained?
This question is traceable to house-price growth, 2001 to 2023 at percentile 93.6 and a +4.4 pp profile-minus-peer difference, not to inferred local behaviour.
- 03
Which real user task would justify changing pricing clarity, qualification steps and expectation setting after seeing Southend-on-Sea's 2023 median house price position and its -£35,000 difference from Sale?
Evidence basis: £335,000, middle half, with Southend-on-Sea minus the national peer equal to -£35,000. Validation route: comprehension tests using the organisation's real offer and fees.
- 04
For Southend-on-Sea's large, coastal, mixed built-up area, nearer to a major town or city classification, how should 2021 population, house-price growth, 2001 to 2023, 2023 median house price be tested as separate website hypotheses without turning the combined pattern into a claim about local demand?
Cross-check all three named comparisons—Letchworth, Hastings, Sale—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
Design for mixed local intent
Southend-on-Sea has a mixed job-density classification. The information architecture should distinguish business, resident and visitor tasks where the organisation actually serves them, while sharing one evidence library so claims remain consistent across journeys.
- 02
Differentiate from the nearby major centre
Southend-on-Sea 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
Build a broad, task-led accessibility baseline
52.7% of the recorded 2021 age-group total is aged 25 to 64, with meaningful younger and older groups also present. Organise content by task, test keyboard and mobile use, and avoid designing around one assumed demographic persona.
- 04
Prepare the content model for change
Southend-on-Sea recorded +12.7% population change from 2001 to 2021 and 0% 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 E63011939. 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 Southend-on-Sea.
Mosalio does not claim an office, staff member, customer, or physical-delivery presence in Southend-on-Sea.
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.