Arthur Williams walks across Britain to discover the people and places that changed the course of World War II. By travelling the length and breadth of Britain, he gets a fresh perspective on the places and people that helped win the war.

Military history enthusiast Dermot O'Leary is joined by ex-Royal Marine Arthur Williams and historian and battlefield guide Lucy Betteridge-Dyson. They unpick the two crucial days that secured victory in some of Britain's most important battles.

A group of strangers take turns hosting their own dinner parties and grading each other, as they battle for the title of best host, and the chance to win a grand cash prize.