Posters of burger rolls filled with bones and fat have appeared across the UK to shock children into improving their diets and help fight obesity. It is estimated that a quarter of young people will be overweight by 2020.

The British Heart Foundation's campaign follows a survey which showed that 36% of eight to fourteen-year-olds did not know the main ingredient of chips was potato. Nearly one in ten of the children questioned thought chips were made of oil, while others suggested eggs