ONS Social Surveys: What Happens to Your Data After You Fill In the Form

The Office for National Statistics has set out how household survey responses are collected, protected and converted into official statistics that shape economic and social policy across the UK, including in Kent.

The UK’s largest independent producer of official statistics, the Office for National Statistics, runs a range of voluntary household surveys — including the Labour Force Survey, the Annual Population Survey and the Living Costs and Food Survey — that draw on random samples of private households to produce figures used in national decisions on employment, welfare, taxation and public spending. Kent households sit within that national sampling frame, meaning responses from residents here feed directly into subnational estimates used by Kent County Council, district councils and regional partners in economic planning.

The figures show that data collected through these surveys are held only as long as needed to produce statistics and are treated as confidential under the Code of Practice for Statistics and UK data legislation, published only in anonymised, aggregated form. No individual or household is identified in the published outputs.

So what does the process actually look like for a Kent household that receives an invitation? Selected addresses get an advance letter explaining the survey, how to take part — online, face-to-face or by telephone — and how their data will be kept safe. Many surveys now use a push-to-web approach, inviting respondents to complete questionnaires online first, with face-to-face or telephone options available where online completion isn’t possible.

Anyone visited by an ONS interviewer in person can verify that interviewer’s identity by calling the ONS freephone Survey Enquiry Line, details of which are included in the advance letter. That verification step is there specifically to reduce fraud risk — impersonation scams do exist, and the ONS is clear that its interviewers carry official identification.

The Labour Force Survey interviews sampled households across five successive waves at three-monthly intervals, with around 20 per cent of the sample replaced each quarter; initial interviews are face-to-face, with follow-up waves mainly by telephone. The Living Costs and Food Survey asks participants to keep a two-week diary of spending on top of answering interview questions — a level of detail that feeds into the price indices used to measure cost-of-living pressures affecting households across Kent.

Yet some privacy advocates question whether data protection assurances and safeguards are sufficient, and critics have raised concerns about digital exclusion in push-to-web designs and whether voluntary participation could bias statistics in harder-to-reach communities. The ONS acknowledges non-response as a methodological challenge and applies data cleaning, weighting and quality assurance to correct for it.

For Kent-based charities, business groups and local authorities, ONS survey outputs are a key evidence base in funding bids, consultations and impact assessments. The Annual Population Survey is specifically designed to produce estimates down to local authority level, making it one of the more direct data sources for understanding employment, unemployment and economic inactivity across Kent’s districts.

Key information

• To verify an ONS interviewer’s identity, call the ONS freephone Survey Enquiry Line — the number is printed in the advance letter sent to selected households.
• Participation in ONS social surveys is voluntary — households are invited, not compelled, to take part.
• Multiple ways to respond are available: online, face-to-face or by telephone, depending on the survey.