The study discovered that packing strategically could help produce remain under 8☌. For example, at an external temperature of 20☌, one of the salt and pepper chicken ready meals climbed 8☌ from 0☌ within nine hours, putting it directly on the cusp of exceeding the UK legal maximum storage temperature. The external temperature played a pivotal role in determining how quickly the ready meals increased in temperature. This variation was also seen for products at different levels within the same box. For example, two salt and pepper chicken ready meals at the bottom of a box exceeded 8☌ within 40 hours, whereas the adjacent egg fried rice only peaked at around 5☌.

The research showed that the rate at which a product reaches 8☌ can depend heavily on the type of product it is and, sometimes, its placement within a box. The study reflected these conditions chilled and frozen ready meals were packed into a cardboard box with ice packs and bubble wrap, and then stored at various temperatures. We conducted this study to answer the question of how long food should be out for delivery until it exceeds 8☌.”įood delivered via non-chilled courier is potentially vulnerable to fluctuations in temperature that occur throughout the day and night. But with this rapid rise come concerns over food safety. “Meal-kit companies are growing ever popular, while some supermarket retailers have teamed up with takeaway courier groups to meet demand. “We’ve seen an explosion in food delivery this year,” said Campden BRI microbiologist Linda Everis, who led the study.

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