If you have been made ill by food poisoning, water contamination or a serious reaction to undeclared allergens in the UK, it's quite possible that you may be able to claim compensation. Whether you have eaten or drank in a hotel, restaurant, pub, or café; or taken food or drink away from a street food establishment, sandwich shop, supermarket or any other retailer, that food retailer is responsible for making sure that the food and drink is fit for human consumption and free of undeclared allergens. Naturally, making a compensation claim for an illness like this is made more difficult by the fact that you may already have eaten all of whatever made you ill. However, following a few simple rules can make it possible to prove the liability of the food retailer.