We only share your personal data with those external organisations who carry out our surveys, or send you mailings between each survey. NatCen Social Research and Kantar are the independent research organisations that have been contracted to carry out the Age 50 Survey, on behalf of the Centre for Longitudinal Studies at University College London. Copyprint UK carry out the mailings between each survey. These external organisations are contractually bound to UCL to keep your data safe and secure, and are accredited to data security standards. We also share your email addresses with MailChimp, in order to send you emails. For more information about how MailChimp processes data please see MailChimp’s privacy notice. Between major surveys, we may carry out short online surveys using Qualtrics, an online survey platform. Qualtrics is accredited to data security standards and is compliant with data protection legislation.