Before the Brief: Five UK Public Data Sources to Mine Before Buying New Research

Commissioning new research is sometimes the right move. It is rarely the first move. Before a UK business spends on a bespoke survey, focus group or market study, it should exhaust the public record. The UK produces an unusual volume of free, structured and locally granular data. Much of it is overlooked because it sits in official portals rather than in a supplier's slide deck. Used well, these sources can sharpen a brief, test a premise and sometimes answer the question outright.

This is not an argument against primary research. It is an argument for research procurement that starts with evidence already paid for by the public purse. In 2026, with budgets still under scrutiny, the discipline is to know what is already known. The five sources below are not a complete list. They are a practical starting sequence for SMEs, consultants and in-house strategy teams.

1. ONS local statistics and Nomis

The Office for National Statistics is the default source for population, employment, business counts and local economic context. Nomis adds detailed labour market data, while local authority profiles and census outputs provide granularity on age, tenure, qualifications and household composition. For an SME considering a new catchment, a branch, a service line or a recruitment drive, these datasets can size the opportunity before a single interview is booked.

The practical value lies in comparison. Rather than looking at a single headline figure, compare the proposed area with existing locations and with regional benchmarks. Look at the direction of travel as well as the level. A growing population of a certain age profile may matter more than a static total. A high business count may signal competition as much as demand.

The limits are real. Geographies change, publication lags vary and small-area data can be suppressed. ONS data will not tell you whether customers like your brand. It will tell you whether the basic demographic and economic conditions for your proposition exist. That is often enough to refine the brief and, occasionally, enough to stop a weak project altogether.

2. Companies House filings

Companies House is not just a compliance register. It is a free competitive intelligence resource. Filing history shows incorporation dates, accounts, confirmation statements, director changes and charges. Standard industrial classification codes allow rough sector mapping. For a business assessing market concentration, supplier stability or a prospect list, the register can reveal patterns that a commissioned market study would otherwise have to discover from scratch.

Use it to test assumptions. If a local market is said to be fragmented, count the active companies in the relevant code and geography. If a key supplier looks vulnerable, check its filing history and charges. If a new competitor claims rapid growth, look at the accounts and the timing of any charge registrations. None of this replaces financial due diligence, but it sharpens the questions.

Be careful with interpretation. Many small companies file abridged accounts, some are dormant, and filing dates lag reality. A company's registered office is not necessarily where it trades. Companies House data is strongest for existence, structure and filing behaviour, and weaker as a direct measure of commercial success.

3. FOI responses and disclosure logs

Freedom of Information requests can unlock data that public authorities hold but do not routinely publish. The Freedom of Information Act 2000 in England, Wales and Northern Ireland, and the equivalent Scottish legislation, gives a right of access to recorded information held by public bodies, subject to exemptions and cost limits. Councils, NHS bodies, regulators, transport authorities and police forces all receive requests. Many now publish disclosure logs, so the first step is to check what has already been released.

For a UK business, FOI can be useful for local service volumes, complaint numbers, procurement spend, licensing activity, enforcement patterns and infrastructure plans. A care provider might request data on assessed need. A logistics firm might ask about road schemes or traffic counts. A retailer might seek information on vacant town centre units. The art is in the wording: ask for recorded data, specify the period and geography, and avoid questions that require the authority to create new analysis.

FOI is not a magic wand. Responses can be slow, inconsistent or refused where an exemption applies. Authorities are not obliged to answer questions that would require judgement rather than disclosure. Even so, a well-targeted request can add local specificity to a brief at minimal cost. If the data does not exist, that is itself a useful finding: it may justify primary research rather than undermine it.

4. Google Trends

Google Trends is often dismissed as a toy. Used with discipline, it is a useful demand signal. It shows relative search interest over time and by UK region or city, along with related queries. For a business testing seasonality, comparing brand and category interest, or spotting a shift in consumer language, it can provide an early indicator before official statistics catch up.

The key is to treat it as relative, not absolute. Trends does not report search volumes. It reports an index based on a sample. Small geographies and narrow terms can be noisy. A spike may reflect a news event rather than a durable change in demand. Use the data to generate hypotheses, not to size a market.

A sensible approach is to compare a small set of related terms, set the geography to the UK or a specific nation or region, and examine several years rather than a single quarter. Pair search interest with ONS data or Companies House activity. If search interest is rising while business registrations are flat, that is a question worth exploring. It is not an answer.

5. Council planning portals

Local planning portals are an underused source of commercial intelligence. They hold applications, decisions, supporting statements, local plan documents and sometimes viability assessments. For a business considering a new site, a competitor's expansion or a change in catchment, planning activity can reveal what is coming before it opens. A retail or leisure operator can see proposed developments nearby. A services business can assess the pipeline of housing or commercial space. A manufacturer can check for employment land allocations.

Portals vary widely in usability and detail. Some authorities provide searchable maps and weekly lists; others require patient navigation. Planning permission is not the same as delivery, and permitted development rights mean some changes never appear as full applications. Local plan adoption can lag. Even with these caveats, the portal is often the only free way to see the physical pipeline that will shape local demand.

Turning public data into a sharper brief

The workflow matters as much as the sources. Start with the decision, not the dataset. Write down the hypotheses that would change the decision. Map each hypothesis to the most credible public source. Extract only what is needed, record the date and geography, and note the limitations. Then ask what remains genuinely uncertain.

The resulting brief should say what is already known, what is contested and why primary research is needed. That structure does three things. It reduces the risk of paying a supplier to rediscover public data. It gives respondents and suppliers a sharper frame. And it makes the procurement decision more defensible, because the business can show that it has tested the cheap options first.

Limits and provenance

Free data is not costless. It requires time, judgement and a habit of documentation. Public sources carry definitions, geographies and publication lags that may not match the commercial question. Google Trends is not a market size. Companies House is not a credit rating. Planning permission is not a guarantee of construction. FOI responses are not a representative survey.

Used with those limits in mind, the public record is a valuable first phase of research procurement. It will not replace every commissioned study. It will make the studies that are commissioned better, cheaper and more focused. For UK businesses in 2026, that is a disciplined way to buy insight: know what the state already knows before paying to ask again.