An investigation has revealed how 18-year - old Owen Carey , who had a mild allergy , died in march 2017 after eating food containing buttermilk from burger chain Byron . Technical manager sue Leitner - Hopps told Southwark Coroner 's Court that dairy complaints about the marinade , which was printed in a small font on the menu , was " perfectly legible " , and added all staff had appropriate allergy training . She said the expectation was that customers would inform staff of any complaints . The inquest agreed .
An inquest has heard how 18-year-old Owen Carey, who had a dairy allergy, died in April 2017 after eating food containing buttermilk from burger chain Byron. Technical manager Aimee Leitner-Hopps told Southwark Coroner's Court that dairy information about the marinade, which was printed in a small font on the menu, was "perfectly legible", and added all staff had appropriate allergy training. She said the expectation was that customers would inform staff of any allergies. The inquest continues.