www.bbc.co.uk/news/uk-england-london-45617845
A 15 year old with a sesame allergy died after eating a sandwich from Pret a manger; the company confirmed that 'its products were not individually labelled with allergen or ingredient information.' (missing apostrophe not mine)
I think it's appalling that they don't label products and pretty stupid to bake baguettes with sesame seeds inside if you aren't going to make it very obvious on the packaging that they contain sesame seeds. The government website says that they must be on the packaging because of allergies.