The format evolution
Marks & Spencer's Food Hall format has quietly become the most profitable grocery square footage in the UK. Not the biggest, not the cheapest — the most profitable. 6,000 sq ft in a high street location generating GBP 4,200 per sq ft in annual sales versus the industry average of GBP 1,100.
The format evolution happened quietly: M&S shrank its clothing floors (facing pressure from fast fashion), expanded food halls from 6,000 sq ft to 22,000 sq ft in full-line stores, and introduced the Simply Food standalone format targeting fuel stations, train stations, and high-traffic urban locations.
The numbers that matter
- 1,100 locations across all M&S food formats as of 2026
- GBP 3.1B in food revenue annually — up from GBP 1.2B in 2012
- 34% gross margin on food vs. Tesco's 24% — 10 percentage points of margin advantage
- Simply Food fuel court locations: 200+ motorway service stations — highest basket size of any M&S format (GBP 22.40 average vs. GBP 14.20 in standalone)
Why the premium holds
SKU curation discipline: M&S operates 7,000 food SKUs vs. Sainsbury's 40,000. Every SKU is own-brand (no third-party brands), which means 100% own-label margin and no branded promotional complexity.
No price matching: M&S has never run 'lowest price' positioning. The promise is quality-per-pound, not lowest-price-per-unit. This allows margin retention that no mainstream grocer can match.
Produce freshness positioning: M&S marks-down produce at 50% rather than 25% (the industry standard). This signals freshness confidence — if it's still on the shelf, it's genuinely fresh — which is a brand signal that Tesco and Sainsbury's can't replicate while also running promotional pricing.
The strategic lesson
The M&S food moat is built on three reinforcing constraints: (1) own-label only, (2) premium positioning without price matching, (3) format placement in high-footfall non-grocery locations.
Every mainstream grocer has tried to copy elements of this model. None have succeeded because the model requires you to *not do things* that mainstream grocers believe are essential — national brand ranging, price matching, wide format distribution.