E63011220 /East of England evidence profile
East of England evidence profile
Colchester digital planning profile
Colchester is a large, non-coastal built-up area in East of England. ONS records show a 2021 population of 130,396; the population expanded quickly between 2001 and 2021, while the 2015 to 2024 employment series shows modest employment growth. 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
- E63011220
- ITL1 region
- East of England
- Coastal
- Non-coastal
- Income-deprivation flag
- Higher deprivation
02 / Context
Three comparisons, with the benchmark stated
21.2% above the 11.2% median across complete England records in this ONS file.
7.8% above the 0% dataset median.
39% 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 95.4 of 100.
Highest decile · percentile position 92.9 of 100.
Lowest decile · percentile position 10 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:a03203f9e18…d1f5ee0707f4
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 Colchester minus the named peer; a plus sign means the value recorded for Colchester is higher.
Regional peer
Peterborough · E63009810
East of England. Nearest complete record in East of England. ONS classification: Nearer - Higher deprivation - Working.
- 2021 population
- -60,196 people
- Population change, 2001 to 2021
- -6.7 pp
- Economic inactivity
- 0 pp
- Employment change, 2015 to 2024
- -1.8 pp
- 2023 median house price
- +£75,000
- House-price growth, 2001 to 2023
- -13.9 pp
- Population aged under 25
- +0.4 pp
- Population aged 65 or over
- +1.2 pp
Classification peer
Bletchley · E63011059
South East. Nearest complete record outside East of England with the same ONS combined classification. ONS classification: Nearer - Higher deprivation - Working.
- 2021 population
- +85,378 people
- Population change, 2001 to 2021
- +1.3 pp
- Economic inactivity
- +0.1 pp
- Employment change, 2015 to 2024
- +7.8 pp
- 2023 median house price
- -£15,000
- House-price growth, 2001 to 2023
- -9.2 pp
- Population aged under 25
- +1.4 pp
- Population aged 65 or over
- -1.5 pp
National peer
Dartford · E63012157
South East. Nearest remaining complete England record. ONS classification: Nearer - Medium deprivation - Working.
- 2021 population
- +61,746 people
- Population change, 2001 to 2021
- -3.4 pp
- Economic inactivity
- +4.8 pp
- Employment change, 2015 to 2024
- -8.9 pp
- 2023 median house price
- -£45,000
- House-price growth, 2001 to 2023
- -13.3 pp
- Population aged under 25
- +0.8 pp
- Population aged 65 or over
- +2.2 pp
05 / Evidence synthesis
Colchester evidence synthesis: 2021 population, Population aged under 25, Population aged 65 or over
Colchester 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 → Population aged under 25 → Population change, 2001 to 2021 → House-price growth, 2001 to 2023 → 2023 median house price → Employment change, 2015 to 2024 → Economic inactivity → Population aged 65 or over.
Furthest-to-nearest distance from the middle percentile: 2021 population → Population aged under 25 → Population aged 65 or over → Population change, 2001 to 2021 → House-price growth, 2001 to 2023 → Economic inactivity → 2023 median house price → Employment change, 2015 to 2024.
Regional peer
2021 population: 130,396 · Peterborough delta -60,196 people
The reviewed record positions Colchester at percentile 95.4 for 2021 population; its published value is 130,396 and its band is highest decile. The same-source regional check uses Peterborough, classified as Nearer - Higher deprivation - Working. The Colchester-minus-Peterborough delta on this metric is -60,196 people. A defensible brief can turn the pair into a verification task for content hierarchy and service-capacity assumptions, using task-frequency interviews and observed completion data before changing the information architecture. The responsible interpretation stops short of intent: population size does not establish addressable demand.
Classification peer
Population aged under 25: 33.3% · Bletchley delta +1.4 pp
For population aged under 25, the source reports 33.3% for Colchester. That sits in the highest decile, 42.9 percentile points from the middle position. The same-source classification check uses Bletchley, classified as Nearer - Higher deprivation - Working. The Colchester-minus-Bletchley delta on this metric is +1.4 pp. This evidence can narrow a discovery question around mobile task speed, privacy explanation and channel continuity, while cross-device usability sessions without age-based assumptions supplies the user-level check the aggregate data cannot provide. This remains contextual evidence—an age-group share does not determine channel preference.
National peer
Population aged 65 or over: 14.6% · Dartford delta +2.2 pp
For population aged 65 or over, the source reports 14.6% for Colchester. That sits in the lowest decile, 40 percentile points from the middle position. Against Dartford's reviewed national record, the displayed delta is +2.2 pp. That comparator comes from the documented rule: nearest remaining complete england record. For planning, document the observation beside readability, keyboard access and assisted alternatives and require inclusive usability sessions and accessibility conformance checks before treating the idea as an accepted requirement. No user or market conclusion follows automatically; an age-group share does not determine digital ability.
This synthesis gives Colchester a bounded evidence trail: three furthest-from-middle measures, three named peers and the large, non-coastal, working built-up area, nearer to a major town or city classification. The combination is useful for deciding what to investigate, not for predicting enquiries. A website brief should preserve the source dates, validation method and reasons for accepting or rejecting each hypothesis.
06 / Evidence interpretation
Planning signals before design decisions
Population context: 130,396 people in 2021
Colchester's recorded population changed from 98,491 in 2001 to 130,396 in 2021 (+32.4%). 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: 14.6% aged 65 or over
The 2021 age-group series records 25,754 people aged 0 to 15, 17,673 aged 16 to 24, 68,003 aged 25 to 64 and 18,992 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: 36% economically inactive
ONS records economic inactivity at 36%. The published composition includes 17.3% retired, 3.6% long-term sick or disabled, 8% students and 4.4% looking after home or family. These categories support inclusive task design; they do not identify individual users or purchasing intent.
Economic context: £305,000 median house price in 2023
The median house-price series moved from £84,000 in 2001 to £285,000 in 2021 and £305,000 in 2023, a published change of +263.1%. 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
Which real user task would justify changing content hierarchy and service-capacity assumptions after seeing Colchester's 2021 population position and its -60,196 people difference from Peterborough?
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
What evidence would show that the population aged under 25 contrast between Colchester and Bletchley should alter mobile task speed, privacy explanation and channel continuity, rather than remain background context?
The prompt combines one distinctive metric with the named classification comparator selected by the eight-metric method. It does not treat either record as search, lead or customer evidence.
- 03
Where should the team record uncertainty when using Colchester's population aged 65 or over value and the Dartford comparison to discuss readability, keyboard access and assisted alternatives?
The prompt combines one distinctive metric with the named national comparator selected by the eight-metric method. It does not treat either record as search, lead or customer evidence.
- 04
For Colchester's large, non-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—Peterborough, Bletchley, Dartford—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
Colchester 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
Colchester 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
33.3% 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
Colchester recorded +32.4% population change from 2001 to 2021 and +7.8% 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 E63011220. 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 Colchester.
Mosalio does not claim an office, staff member, customer, or physical-delivery presence in Colchester.
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.