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‘Food Deserts’ Mapped Across London Using Grocery Shopping Data

Analysis of 420 million Tesco grocery items from 1.6 million shoppers reveals specific London areas with limited access to nutritious food, highlighting health risks linked to poor diet.

  • On November 6, Tayla Broadbridge and colleagues published a PLOS Complex Systems study mapping London's food deserts, revealing large clusters in East London and parts of west London such as Ealing and Brent.
  • To target local interventions, the researchers analyzed Tesco Grocery 1.0 dataset of 420 million food items bought by 1.6 million Tesco Clubcard owners at 411 Tesco grocery stores across London in 2015 using a statistical model.
  • Researchers report geographic clusters where shopping favors processed foods; inner north-west boroughs show the most nutritious trends, while east London and western boroughs have the least, with demographic links varying regionally.
  • The authors argue purchase-based mapping can guide area-specific public-health interventions, as their statistical model explained much of London's variation in food buying and highlights areas most at risk of obesity, diabetes, and heart disease.
  • Because transactions were linked to anonymized home areas, researchers say purchase maps reveal real access to healthy food, showing higher income relates to nutrient-deficient purchases in parts of east and west London but more nutritious ones in the inner-west.
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‘Food deserts’ mapped across London using grocery shopping data

Tesco loyalty-card data revealed unequal sales levels of nutritious food across the city.

·Missoula, United States
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Medical Xpress broke the news in on Thursday, November 6, 2025.
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