More than half take up eating oily fish (53%) and 46% eat more fruit and vegetables.

BBC: One in three students wears 'lucky exam underwear'

The food industry said it supported government action to encourage children to eat more fruit and vegetables.

BBC: Children eating

In the study, the participants in the Mediterranean diet groups agreed to replace red meat with white meat like chicken and eat three or more servings of fish each week, along with three or more servings of fruit and two or more servings of vegetables a day.

CNN: Mediterranean diet lowers risk of heart attack, stroke