Competing interests: PJT reports personal fees from Aimmune Therapeutics, DBV Technologies, Allergenis, Aquestive, UK Food Standards Agency and ILSI Europe; grants from National Institute for Health Research (NIHR)/Imperial Biomedical Research Centre, UK Medical Research Council, UK Food Standards Agency, End Allergies Together, Jon Moulton Charity Trust, outside the submitted work. NM is current Chairperson of the BSACI Paediatric Allergy Committee and reports advisory board fees from Aimmune Therapeutics and DBV Technologies. GR is current President of the BSACI and reports grants from UK Food Standards Agency, DBV and the European Union, and funding from the Natasha Allergy Research Foundation. ATF is a trustee and past-president of the BSACI and reports consultancy for Aimmune Therapeutics on behalf of GST consulting (no personal fee) and has been a subinvestigator on Aimmune trials. He is the director of Food Allergy Immunotherapy and chair of the Health Advisory Board of Allergy UK.