Horse meat eaten without the knowledge of the consumer, due to accidental or fraudulent introduction of horse meat into human food. A 2003 Food Standards Agency (FSA) investigation revealed that certain sausages, salami and similar products such as chorizo and pastrami sometimes contain horse meat without it being listed, although listing is legally required. The 2013 horse meat scandal involved multiple products being recalled from shelves due to unlabelled horse meat in amounts up to 100% of the meat content. The issue came to light on 15 January 2013, when it was reported that horse DNA had been discovered in frozen beefburgers
Tesco Clubcard users have concerns about the information Tesco and Dunnhumby hold and what they do with it. Every time a Clubcard is used a copy of the store shopped in, products purchased and price paid are stored against the Clubcard account. Applicants are asked to provide personal details such as name, address and children. Tesco have stated that this is to help them pick vouchers that are relevant to the holder and also monitor trends to help product availability. In February 2014, over 2,000 email addresses, passwords and voucher balances were leaked online following a security breach. Tesco shut down all