Tesco is the country's biggest supermarket and Europe's largest private employer.

So what are the secrets behind this juggernaut’s success? In this one off programme, we unpack everything you need to know about Britain’s favourite supermarket – revealing exactly how they make their money; getting to the bottom of some of the biggest rumours and myths surrounding the retail behemoth; discovering the secret ways they make you spend and revealing the ingenious hacks to help you shop smarter. How do they really do it?