This documentary explores how the reign of Queen Elizabeth II has been a thread of continuity running through 70 tumultuous years of British history. It looks at how the Queen has worn the Crown during an era in which her country and her people changed beyond all recognition. From politics and the economy to industry and technology. From our working life to our family life. From what we eat to how we dress, how we spend our money and what we do in our free time. The programme shows how during these great moments of social change Elizabeth II was no bystander, but someone who often led the way, reflecting and engaging with the critical moments in our post war history.