Testing tomatoes

Available for over a year

Have these saucy fruits become less healthy over time? We examine a claim that you’d need to eat 10 tomatoes grown today to get the same nutritional value of one grown in the 1950s. Also: as Britain’s general election continues, we check promises made on the campaign trail about levels of public spending. Presenter: Tim Harford Producer: Darin Graham Editor: Richard Vadon (Heritage homegrown tomatoes. Credit: Pamela Joe McFarlane / Getty images)