Kirsty Young celebrates the 70th wedding anniversary of the Queen and Prince Philip by examining the longest royal marriage in British history through key moments. She looks at how every step of their life together has been played out in the glare of publicity and in service of the nation, while steering it through decades of change.

Cast: Kirsty Young, Elizabeth II of the United Kingdom, Prince Philip, Duke of Edinburgh, Queen Elizabeth the Queen Mother, King George VI of the United Kingdom, Gyles Brandreth