Josie Gibson joins a disco-inspired dance class that soared in popularity across the decade, and enjoys half a fish-and-chip supper that represents the typical 1970s portion size. She also visits the Museum of Brands and discovers that the decade marked a pivotal shift in eating habits. Josie hosts a 1970s-themed party, before doctor and nutritionist Helen Lawal reveals the impact the '70s diet and lifestyle has had on the presenter's weight, fitness and health