EggAI-v0.1 · Draft synthetic research · 30 October 2026
A synthetic study of how UK grocery shoppers will shop from now to Christmas 2026: where they are cutting volume, which deals move them between supermarkets, how far Aldi and Lidl reach, whether premium own label beats brands for treats at home, how they react to warnings of 7% food inflation in 2027, and who buys low- and no-alcohol drinks.
Lower-, middle- and higher-income households; families with children; under 35s and over 65s; Tesco, Sainsbury's, Asda, Morrisons and Aldi/Lidl main shoppers; loyalty-card holders; four age groups for drinks.
Six question-led readouts with 13 forecast survey items, 14 grocery categories and three deal arms, each broken down by segment and graded for process risk.
Plan Christmas range, promotions and own-label space, then check every headline against the January data named in each section before relying on the method.
Two versions of this study: Forecast mode (this page) · Panel mode. Same questions, two ways of answering them.
Christmas does not reverse the volume squeeze. In 13 of 14 categories more households expect to buy less than more over 18–31 December than last year. The net balance runs from −8 points for frozen food to −17 for chocolate, sweets and biscuits. Low- and no-alcohol drinks are the only category with more buyers expecting to buy more (9%) than less (4%). Lower-income households carry the cut: 33% expect to buy less meat, against 17% of higher-income households.
A loyalty price works like a straight cut; a multibuy does not. With equal usual prices and equal convenience, 73% say they are very or fairly likely to move part of their Christmas shop for 20% off with a loyalty card and 74% for a plain 20% cut, against 60% for 20% off when buying two. Shoppers expect about 36% of their Christmas grocery spend to be on promotion (about 24% for Aldi and Lidl main shoppers).
Discounters and premium own label both gain, along income lines. 19% expect to spend most with Aldi (12%) or Lidl (7%) this Christmas, rising to 29% of lower-income households. For festive treats, premium own label leads (32%) ahead of brands and standard own label (24% each): 38% among higher-income households, while lower-income households lean to standard own label (36%).
These are stated plans, forecast by a model. Twelve of 13 items are grade C: future intentions with no real benchmark yet. The 7% inflation warning has passed most people by (47% had not heard it), and only about 24% say it is changing their shopping now. The January check below is the first real test.
Lower-income households (bottom third), Middle-income households, Higher-income households (top third), Families with children at home, Over 65s
Share cutting volume by category now, and the share expecting to buy more, the same or less of each category at Christmas than last Christmas
Volume change by category through December, and which categories bounce back for Christmas.
Why now: Grocery sales are up about 1% against about 2.5% inflation, so volumes are falling.
Over the past four weeks, the categories most often bought in smaller quantities are chocolate, sweets and biscuits (29% bought less), meat and poultry (25%), cupboard foods and savoury snacks (24% each) and fresh fruit and vegetables (23%). For Christmas (18–31 December) the balance barely moves: buying less still outweighs buying more in 13 of 14 categories, from −8 points for frozen food to −17 for chocolate, sweets and biscuits. Only low- and no-alcohol drinks show more households expecting to buy more (9%) than less (4%).
The cut is concentrated in lower-income households: for Christmas, 33% expect to buy less meat and poultry, 36% less chocolate, sweets and biscuits and 32% less cake and dessert, against 17%, 19% and 16% of higher-income households.
Higher-income households are close to flat: in most categories 10–16% expect to buy more and at most 19% less.
Fish and seafood, chilled ready meals and alcohol have large non-buying groups (21–26% bought none in either year), so their shares rest on smaller buyer bases.
Evidence the forecasts drew on: R01 · IGD report reveals Christmas confidence boost · R02 · Budget and food inflation: A leaner Christmas ahead? · R03 · IGD: retailers face flat-volume Christmas as shoppers trade down on essentials and up on treats · R04 · IPA | More ‘tight’ than white Christmas, reveals new IPA research · R05 · Rising UK supermarket price inflation forcing shoppers to hunt for bargains | The Independent. See the reference register below.
Tesco main shoppers, Sainsbury's main shoppers, Asda or Morrisons main shoppers, Aldi or Lidl main shoppers, Loyalty-card holders, Under 35s
Expected share of Christmas spend bought on promotion, and which deal type would most make shoppers switch supermarket for part of the Christmas shop
Promotional share of Christmas spend, and switching driven by loyalty prices vs multibuys vs price cuts.
Why now: Supermarket promotion spend is up more than £250m year on year.
Shoppers expect to buy about 36% of their Christmas grocery spend on promotion (mean of the stated bands, excluding don't know), with the largest groups at 20–30% (15%) and 40–50% (14%). Aldi and Lidl main shoppers expect much less, about 24%. In a matched deal test, a loyalty-card price and a plain price cut pull equally (73% and 74% very or fairly likely to move part of the shop); a multibuy pulls less (60%).
Loyalty-card holders expect the highest promoted share: 40% put it above 40% of spend, against 19% of Aldi and Lidl main shoppers.
Segments barely differ in the deal test: every group ranks plain cut ≈ loyalty price > multibuy, within 3 points.
Evidence the forecasts drew on: R06 · Seven in ten shoppers say personalised rewards could influence where they shop as retailers enter Golden Quarter - Retail Focus Magazine - Retail Design · R07 · £20bn set to be spent on Christmas groceries yet UK consumers prioritise affordability - NIQ · R08 · Sensormatic Solutions predicts the UK’s busiest 2026 Christmas shopping days – ISN Magazine · R09 · Christmas Shopping Trends: Last-Minute Insights | IGD ShopperVista. See the reference register below.
Tesco main shoppers, Sainsbury's main shoppers, Asda main shoppers, Morrisons main shoppers, Lower-income households (bottom third), Higher-income households (top third), Families with children at home
Where shoppers plan to do their main Christmas food shop, the share of Big Four shoppers moving all or part of it to Aldi or Lidl, and the profile of switchers
Discounter Christmas share and the profile of shoppers who switch.
Why now: Lidl is at about 8.6% market share and growing about 7.1%.
19% of shoppers expect to spend the most with a discounter this Christmas: Aldi 12%, Lidl 7%. Tesco leads at 24%, then Sainsbury's 14% and Asda 10%. 57% expect to spend at least something at Aldi or Lidl, and 19% expect half or more of their Christmas spend to go there. Lower-income households lean furthest: 29% name a discounter as their largest Christmas retailer.
Big Four main shoppers mostly stay: 71–77% expect to spend most with their usual supermarket. Between 43% and 44% of each Big Four group expect to put some, but less than half, of their Christmas spend at Aldi or Lidl, so the move is a top-up shop, not a switch.
Among shoppers who expect to buy from a discounter, Aldi only (42%) outnumbers Lidl only (24%); 34% expect to use both.
Higher-income households put Waitrose (10%) and Marks & Spencer (9%) on a par with Aldi (10%) as their largest Christmas retailer.
Evidence the forecasts drew on: R05 · Rising UK supermarket price inflation forcing shoppers to hunt for bargains | The Independent · R06 · Seven in ten shoppers say personalised rewards could influence where they shop as retailers enter Golden Quarter - Retail Focus Magazine - Retail Design · R09 · Christmas Shopping Trends: Last-Minute Insights | IGD ShopperVista · R10 · Revealed: Brits to spend most with Amazon and Tesco this Christmas | Retail Week · R11 · Golden quarter week eight: How do shoppers plan to celebrate and shop this Christmas? · R12 · Aldi and Lidl grab record Christmas sales share as Asda and Co-op slide | Supermarkets | The Guardian · R13 · Christmas Food Shopping: When the Stakes Are High, Shoppers Choose Certainty · R14 · Aldi vs Lidl average unit price gap widening, data shows | The Grocer. See the reference register below.
Lower-income households (bottom third), Middle-income households, Higher-income households (top third), Under 35s, Over 65s
For festive treat categories (party food, desserts, chocolates, cheese, mince pies), the split between premium own label, standard own label and brands, by income band
Premium own-label vs branded share in festive categories, by income band.
Why now: Volumes are squeezed, and premium own label grew last Christmas.
Across party food, desserts, chocolates, cheese and mince pies, premium own label (Finest, Taste the Difference, Specially Selected and similar) is the most common largest-spend type at 32%, ahead of brands and standard own label (24% each); 10% expect an even split. The pattern follows income: premium own label leads among higher-income households (38%, brands 28%), while lower-income households lean to standard own label (36%, premium 24%).
Under 35s are the most evenly split: premium own label and brands at 26% each.
Evidence the forecasts drew on: R03 · IGD: retailers face flat-volume Christmas as shoppers trade down on essentials and up on treats · R07 · £20bn set to be spent on Christmas groceries yet UK consumers prioritise affordability - NIQ · R15 · Trusted, But Traded Down: How Own-Label Became Good Enough to Challenge Brands — The Harris Poll UK. See the reference register below.
Lower-income households (bottom third), Higher-income households (top third), Families with children at home, Over 65s, Under 35s
Share of shoppers changing behaviour now because of the inflation warnings (stocking up, trading down, no change), and the categories they stock up on
Share of shoppers changing behaviour now, and which categories they stock up on.
Why now: Industry warnings of 7% food inflation in 2027 and the Budget are in the news.
Most people are not reacting: 47% had not heard the warnings and 25% heard them but are not changing their plans. About 24% say they will change something now, mostly by switching to cheaper products or shops (13% switch only, 6% switch and stock up); only 2% plan to stock up alone. Those who stock up expect to spend most on tinned, jarred and dried foods (34%) and frozen food (18%).
Lower-income households are the most likely to switch cheaper (18%, against 9% of higher-income households); over 65s are the most likely to have heard and ignored the warning (36%).
Families with children are the most likely to both stock up and switch (10%).
Evidence the forecasts drew on: R16 · More than eight in ten Brits fear rising prices · R17 · Own label closes quality gap as shoppers mull trading down | The Grocer · R18 · Christmas retail trends: seven predictions for 2026 | IGD · R19 · UK shoppers cut back to offset rising inflation, survey reveals - Grocery Gazette - Latest Grocery Industry News · R20 · UK food price inflation could hit nearly 7% in 2027, says industry researcher | Reuters · R21 · Christmas reprieve as FDF slashes food inflation estimates | News | The Grocer. See the reference register below.
Aged 18-24, Aged 25-34, Aged 35-54, Aged 55+
Share of Christmas drinks buyers who will buy low/no alcohol, its share of their festive drinks spend, and the split by age group
Low/no share of festive drinks spend by age group.
Why now: Low- and no-alcohol was a visible feature of last Christmas.
25% of shoppers expect their Christmas drinks to include some low- or no-alcohol drinks, 43% expect none, and 17% don't yet know. Buying is younger: 30% of 18–24s and 33% of 25–34s, against 27% of 35–54s and 18% of over 55s. 57% expect to spend nothing on low/no; the stated average share of Christmas drinks spend is about 10%.
Low/no is the only grocery category in this study where more households expect to buy more at Christmas than last year (9% vs 4%), led by higher-income households (14%).
Evidence the forecasts drew on: R04 · IPA | More ‘tight’ than white Christmas, reveals new IPA research · R22 · Three in four UK adults embrace moderate drinking over Christmas | Drinkaware · R23 · Alcohol-free and low-alcohol drinks in the UK: Trends, barriers, and opportunities | Drinkaware · R24 · Expanded low- and no-alcohol drink ranges key to entice younger generations to splash out over Christmas period, says GlobalData · R25 · Worldpanel by Numerator: promotions, premium own label and no alcohol options: inside Britain’s £13.8bn Christmas grocery shop · R26 · YouGov survey shows continuing demand for Low and No-Alcohol drinks as more UK adults choose moderate consumption - Portman Group · R27 · Festive recap: RTDs, low & no and stouts thrive - Drinks Retailing. See the reference register below.
Every forecast here was made on 30 October 2026, with web search limited to pages published before that date. In January we will compare them with the market data named in the research brief. Survey shares and market measures are different units, so each row says what can fairly be compared.
| Question | Our forecast now | Checked against | How directly it compares |
|---|---|---|---|
| UK1 · Volume | No Christmas reversal: buying less outweighs buying more in 13 of 14 categories; deepest in chocolate, sweets and biscuits (−17) and meat (−16), lightest in frozen (−8). Low/no alcohol is the only net gainer (+5). | Worldpanel (Kantar) volume by category, December | Direction and category ranking |
| UK2 · Promotions | About 36% of Christmas spend expected on promotion; loyalty price ≈ plain cut (73–74%) > multibuy (60%) as a reason to move part of the shop. | Promotional share of sales, 12 weeks to late December | Direction: record or not |
| UK3 · Discounters | 19% name Aldi or Lidl as their largest Christmas retailer (Aldi 12%, Lidl 7%); 57% expect some discounter spend. | Discounter value share, 4 weeks to Christmas | Level comparable only roughly (shoppers vs value) |
| UK4 · Premium own label | Premium own label is the largest treat spend for 32% of households vs 24% for brands; strongest among higher-income households (38%). | Premium own-label sales growth | Direction only |
| UK5 · Inflation warning | About 24% change behaviour now, mostly switching cheaper; stocking up is rare (8%) and led by tins, jars and dried food, then frozen. | Pantry-category volumes, Nov–Dec | Direction: no broad stock-up |
| UK6 · Low/no alcohol | 25% of shoppers buy some low/no for Christmas; 25–34s highest (33%), over 55s lowest (18%). | Low/no alcohol sales, December | Growth direction and age skew |
This is an exploratory synthetic study, not fieldwork. It forecasts answer distributions for six research questions to find hypotheses and sensitivities before Christmas, and sets down predictions that market data can check in January.
The audience is UK adults aged 18+ who do all or some of their household's grocery shopping. A frame of 1,130 European Social Survey Round 10 respondents from Great Britain (demographics only, post-stratification weighted) was built, but no question needed per-person answers, so it was not used to generate respondents.
Segments such as “Aldi or Lidl main shoppers” or “lower-income households” are text descriptions given to the forecaster. Their size in the population is not estimated and they overlap.
The harness turned each research question into one to three single-choice items with neutral wording, a don't-know option where a real survey would have one, and explicit reference periods. Grocery categories and deal types are arms: a respondent answers once per category, or sees one deal.
Items were rule-checked, repaired and frozen before any forecast. Scenario details such as the 20% deals are experimental assumptions, not current offers.
For each question, web searches limited to pages published before 30 October 2026 were condensed into dated evidence notes. A citation gate keeps only exact retrieved URLs.
gpt-6.1-sol forecast each item for all shoppers (three answer orders averaged) and for each segment (two orders averaged). Forecasts are model runs, not respondents.
No calibration was fitted: no UK Christmas grocery survey with known results was available to fit and test against. Each item carries an expected error from a backtest on 402 published survey questions (UK/EU and SEA), its spread across answer orders, its evidence status and risk flags.
Grades describe process risk, not accuracy on this study. On a held-out bank of published UK and EU survey questions, this forecast path averaged 8.5 TVD points against 9.3 for a plain forecast. The January check is the first test against real outcomes for these questions.
| Diagnostic | Items | Denominator |
|---|---|---|
| Grade A / B / C | 1 / 0 / 12 | 13 |
| Intention/behaviour item: models tend to overstate action | 13 | 13 |
| Filtered base: check who answers | 10 | 13 |
| Unstable across option orders (spread > 6 pts) | 4 | 13 |
| Hypothetical scenario, no real-world benchmark | 3 | 13 |
| No usable dated evidence; rests on model knowledge | 2 | 13 |
| Forecaster calls / web searches | 581 / 32 | – |
Search the exact question text, base and answer options. Category and deal arms are listed under each question; each respondent would answer once per category, or see one deal arm.
| ID | Method | Base | Question | Options |
|---|
Every page below was published before 30 October 2026 and kept by the citation gate because a forecast's evidence note cites it. They describe context and earlier results, not answers to this questionnaire.
EggAI Research · Draft / 30 October 2026. Exploratory synthetic outputs from the EggAI-v0.1 research harness; not affiliated with or endorsed by any retailer named. Retailer and brand names are used only to describe answer options. Population frame: European Social Survey Round 10 (ESS ERIC), demographics only. Contact [email protected].