The problem is how do you define "junk food." I noticed the article below- the Brits are now defining cheese as junk food for purposes of restricting commercials on children's television. Also banned are the following:
"Marmite, Flora Lite, half-fat cheddar, Dairylea triangles, bran flakes, camembert, sugar-coated puffed wheat, instant hot oat cereal, Jaffa cakes, reduced calorie mayonnaise, multi-grain hoop cereal, half-fat creme fraiche, takeaway chicken nuggets, potato waffles, Greek yoghurt (from sheep's milk), ham, sausages, bacon rashers, low-fat spreads, peanuts, cashew nuts, pistachio-nuts, peanut butter, raisins, sultanas, currants, low-fat potato crisps, olive oil, butter, pizza, hamburgers, tomato ketchup, chocolate, brown sauce, cola and lemonade."
http://www.dailymail.co.uk/pages/live/articles/news/news.html?in_article_id=426083&in_page_id=1770