E63011563 /East of England evidence profile
East of England evidence profile
Chelmsford digital planning profile
Chelmsford is a large, non-coastal built-up area in East of England. ONS records show a 2021 population of 110,612; 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
- E63011563
- ITL1 region
- East of England
- Coastal
- Non-coastal
- Income-deprivation flag
- Lower deprivation
02 / Context
Three comparisons, with the benchmark stated
9.9% above the 11.2% median across complete England records in this ONS file.
15.8% above the 0% dataset median.
1% 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 94 of 100.
Lower quartile · percentile position 12.9 of 100.
Lower quartile · percentile position 20.1 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:e33d484a9b2…c42e774f2a11
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 Chelmsford minus the named peer; a plus sign means the value recorded for Chelmsford is higher.
Regional peer
Welwyn Garden City · E63011463
East of England. Nearest complete record in East of England. ONS classification: Nearer - Medium deprivation - Working.
- 2021 population
- +59,108 people
- Population change, 2001 to 2021
- +6.9 pp
- Economic inactivity
- -0.2 pp
- Employment change, 2015 to 2024
- +2.5 pp
- 2023 median house price
- -£45,000
- House-price growth, 2001 to 2023
- -7.6 pp
- Population aged under 25
- -0.8 pp
- Population aged 65 or over
- +0.4 pp
Classification peer
Woking · E63012531
South East. Nearest complete record outside East of England with the same ONS combined classification. ONS classification: Nearer - Lower deprivation - Working.
- 2021 population
- +34,957 people
- Population change, 2001 to 2021
- +4.1 pp
- Economic inactivity
- +1.8 pp
- Employment change, 2015 to 2024
- +9.7 pp
- 2023 median house price
- -£60,000
- House-price growth, 2001 to 2023
- +26.5 pp
- Population aged under 25
- 0 pp
- Population aged 65 or over
- +1.4 pp
National peer
Bedford · E63010690
East of England. Nearest remaining complete England record. ONS classification: Nearer - Higher deprivation - Working.
- 2021 population
- +13,386 people
- Population change, 2001 to 2021
- +3.6 pp
- Economic inactivity
- -2.2 pp
- Employment change, 2015 to 2024
- +7.3 pp
- 2023 median house price
- +£79,500
- House-price growth, 2001 to 2023
- -12.7 pp
- Population aged under 25
- -1.4 pp
- Population aged 65 or over
- +1.2 pp
05 / Evidence synthesis
Chelmsford evidence synthesis: 2021 population, Economic inactivity, Population aged 65 or over
Chelmsford 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: 2021 population → 2023 median house price → Population change, 2001 to 2021 → Employment change, 2015 to 2024 → Population aged under 25 → House-price growth, 2001 to 2023 → Population aged 65 or over → Economic inactivity.
Furthest-to-nearest distance from the middle percentile: 2021 population → Economic inactivity → Population aged 65 or over → 2023 median house price → Population change, 2001 to 2021 → Employment change, 2015 to 2024 → Population aged under 25 → House-price growth, 2001 to 2023.
Regional peer
2021 population: 110,612 · Welwyn Garden City delta +59,108 people
At 110,612, 2021 population places Chelmsford in the highest decile and at percentile 94 of the reviewed distribution. Using Welwyn Garden City as the regional peer, the profile-minus-peer delta is +59,108 people; the peer was selected because nearest complete record in east of england. Treat this combination as a hypothesis about content hierarchy and service-capacity assumptions, and test it through task-frequency interviews and observed completion data. This remains contextual evidence—population size does not establish addressable demand.
Classification peer
Economic inactivity: 34% · Woking delta +1.8 pp
Chelmsford's economic inactivity is 34%, a lower quartile result at percentile 12.9 among 936 complete England records. Against Woking's reviewed classification record, the displayed delta is +1.8 pp. That comparator comes from the documented rule: nearest complete record outside east of england with the same ons combined classification. Its practical use is to frame—not answer—a question about assisted, accessible and non-digital completion routes; the next evidence should come from accessibility testing across real tasks and support-channel evidence. The boundary is important: an aggregate inactivity rate cannot describe an individual visitor.
National peer
Population aged 65 or over: 16.7% · Bedford delta +1.2 pp
The reviewed record positions Chelmsford at percentile 20.1 for population aged 65 or over; its published value is 16.7% and its band is lower quartile. For a bounded comparison rather than a national average, Bedford supplies the national reference; Chelmsford is +1.2 pp from it on the displayed scale. This evidence can narrow a discovery question around readability, keyboard access and assisted alternatives, while inclusive usability sessions and accessibility conformance checks supplies the user-level check the aggregate data cannot provide. No user or market conclusion follows automatically; an age-group share does not determine digital ability.
The distinctive metrics are not interchangeable: 2021 population, economic inactivity, population aged 65 or over each raise a different planning question when read beside Welwyn Garden City, Woking, Bedford. For Chelmsford, 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: 110,612 people in 2021
Chelmsford's recorded population changed from 91,362 in 2001 to 110,612 in 2021 (+21.1%). 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: 16.7% aged 65 or over
The 2021 age-group series records 21,387 people aged 0 to 15, 10,598 aged 16 to 24, 60,132 aged 25 to 64 and 18,495 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: 34% economically inactive
ONS records economic inactivity at 34%. The published composition includes 20.2% retired, 2.6% long-term sick or disabled, 4.3% students and 4.2% looking after home or family. These categories support inclusive task design; they do not identify individual users or purchasing intent.
Economic context: £370,000 median house price in 2023
The median house-price series moved from £114,500 in 2001 to £355,000 in 2021 and £370,000 in 2023, a published change of +223.1%. 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
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 Chelmsford?
Evidence basis: 110,612, highest decile, with Chelmsford minus the regional peer equal to +59,108 people. Validation route: task-frequency interviews and observed completion data.
- 02
How should a prototype test assisted, accessible and non-digital completion routes without assuming that Chelmsford's percentile 12.9 position predicts an individual user's needs?
This question is traceable to economic inactivity at percentile 12.9 and a +1.8 pp profile-minus-peer difference, not to inferred local behaviour.
- 03
Where should the team record uncertainty when using Chelmsford's population aged 65 or over value and the Bedford comparison to discuss readability, keyboard access and assisted alternatives?
This question is traceable to population aged 65 or over at percentile 20.1 and a +1.2 pp profile-minus-peer difference, not to inferred local behaviour.
- 04
For Chelmsford's large, non-coastal, working built-up area, nearer to a major town or city classification, how should 2021 population, economic inactivity, 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—Welwyn Garden City, Woking, Bedford—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
Chelmsford 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
Chelmsford 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
54.4% 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
Chelmsford recorded +21.1% population change from 2001 to 2021 and +15.8% 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 E63011563. 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 Chelmsford.
Mosalio does not claim an office, staff member, customer, or physical-delivery presence in Chelmsford.
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.