How much do you know about what really goes on at your local supermarket?We see them every week and they are privy to some of our most intimate secrets – those we wouldn't even share with our closest friends. To us they are the anonymous helpers for whom nothing is too much trouble. But for them, every customer has a part in a gripping soap-opera of lovers' tiffs, family feuds and extraordinary innuendos – turning the daily life of a checkout girl into a hilariously entertaining farce.As we...