The Wedding Day looks behind the pomp and ritual of one wedding to unveil British attitudes to marriage, through two very different families. Serena and Jordan, a bright, ambitious couple in their twenties, are getting married. They have contrasting backgrounds: Serena is from a wealthy Cambridgeshire family while Jordan comes from a more modest background in Stoke. Serena's parents are divorced, Jordan's are still together. For the first time in years the entire family will all be in the same room but this time with new girlfriends and step-parents. Confessional interviews with the couple and their families reveal their expectations of married life and how their different stories influence their view of marriage.