The first programme includes a pair of Manchester sewer men with firsthand knowledge of the nation's poor diet, an event cleaner with an insight into how Brits behave in a crowd and two window cleaners with the terrifying task of keeping a huge national icon absolutely spotless

This week, the remarkable things they find behind the nation's front doors. From the domestic maids who are expected to maintain an obsessive standard of cleanliness to the pest controller faced with a home that has been overrun by pigeons.