On August 30, 2023, 12-year-old Mia Shay St Hilaire died of anaphylaxis after taking two sips of a Twix milkshake from the Pop Inn Cafe in Southwark Park Road, London. Unwashed equipment caused fatal hazelnut cross-contamination from a previously prepared Kinder Bueno drink.
In Plain English: The Clinical Takeaway
- Cross-Contamination: The blender used for Mia’s drink still contained hazelnut residue from a drink made roughly 25 minutes earlier.
- Anaphylaxis: A severe allergic reaction that Mia died of as a result.
- Adrenaline Auto-Injector (AAI): Emergency medication designed to treat acute allergic reactions.
The Inquest Findings and the Fatal Sequence
Assistant coroner Briony Ballard published a narrative conclusion at London Inner South Coroner’s Court detailing the sequence of events. Mia, visiting London from Sydenham with her aunt and sister, drank two sips of the Twix shake before telling her aunt, “This has nuts in.”
Her aunt brought her to a pharmacy where she received antihistamines. After returning home, Mia collapsed. Emergency services arrived and transported her to Evelina London Children’s Hospital.
Doctors placed her on life support to allow her family time to say goodbye, but she ultimately died as a result of anaphylaxis. Video footage from closed-circuit television revealed that 48-year-old cafe proprietor Baris Yucel had neglected to wash the blender prior to making Mia’s beverage.
During the emergency response, Mia was given a 150 microgram dose of AAI. The coroner noted the correct dose would have been 300mg, though she added that the correct prescription of AAI would still not have prevented her death.
Regulatory Penalties and Food Safety Inspections
Five days after the incident, inspectors visited the Pop Inn Cafe and assigned it a food hygiene rating of 1. The inspector found evidence of cross-contamination and a lack of appropriate allergen information.
Southwark Council brought a case against the cafe. In January 2025, Yucel pleaded guilty to six offences. The charges encompassed failing to provide clear or visible allergen guidance to customers, omitting proper controls for allergen cross-contamination during food preparation, and providing a dish containing an unintended allergenic component. A court fined him £18,000 and handed him a 100-hour community order.
| Incident Detail | Recorded Fact |
|---|---|
| Date of Consumption | August 30, 2023 |
| Victim Age | 12 years old |
| Contaminant | Hazelnut residue (Kinder Bueno) |
| Cafe Operator | Baris Yucel (48) |
| Legal Outcome (January 2025) | Guilty on 6 charges, £18,000 fine, 100-hour community order |
Contraindications & When to Consult a Doctor
Anyone experiencing symptoms of an anaphylactic reaction requires immediate administration of an adrenaline auto-injector and emergency medical evaluation.
Family Advocacy and Industry Reform Demands
Mia’s parents, Adrian and Chanel, released a statement through their representative Michelle Victor emphasizing the potentially catastrophic consequences of poorly implemented, monitored, and enforced allergy management systems. They called on the Food Standards Agency and relevant authorities to review current safety frameworks and consider meaningful reforms.
Tanya Ednan-Laperouse OBE, founder of Natasha’s Foundation—whose own 15-year-old daughter Natasha died on 17 July 2016 following an allergic reaction—also spoke on the case. She stressed that food allergies represent a serious, unpredictable medical condition, arguing that food allergen regulations should be as important as food hygiene.
References
- Inquest of Mia Shay St Hilaire at London Inner South Coroner’s Court.
- Southwark Council food safety inspection records and prosecution proceedings against Pop Inn Cafe.
- Natasha’s Foundation public statements regarding food allergen regulatory frameworks.
