Campaigners have branded the decision of some food manufacturers not to use a colour-coded labelling system on cereals as "scandalous".

Cafe goers need to “check nutritional advice” as a report reveals up to 25 teaspoons of sugar in some hot drinks. British campaign group, Action on Sugar, analysed 131 hot drinks sold by big brand coffee shops and revealed one-in-three contain nine teaspoons of sugar or more, making them as sugary as Coca Cola.

Some of the unhealthiest cereals contain more sugar than they did in 2012, with children eating up to the equivalent of seven and a half Cadbury fingers for breakfast, according to a charity.

Well-meaning parents who would not dream of giving their children Coca-Cola might instead be packing their lunchboxes with juices that are even more sugary, a health group has warned.

Health officials should set targets for the reduction of sugar in fizzy drinks, experts have said after new research highlighted the “shockingly high and unnecessary” levels of sugar in cans of fizzy drinks.