Inequalities and people being "cash poor" and "time poor" are the real causes of unhealthy eating, say campaigners.
Three quarters of the best-selling items in hospitals are unhealthy, a study has found.
Healthy products are allowed.
Experts call for global consumption of plant-based food to double, while red meat intake is halved.
40% of 10-11 year olds in the capital are overweight or obese.
Find out if your town makes the list
We asked parents if Tony the Tiger and the Milky Bar Kid should be banned from kids' food.
If there had been higher prices on ‘unhealthy’ food when I was a kid, I would have gone to bed hungry
The letter is signed by Labour leader Jeremy Corbyn, The Liberal Democrats and The Scottish National Party.
"Currently the only ad-blocker kids have got is covering their eyes."