I've watched enough of "The Great British Baking Show" to know about that love of biscuits and tea cakes. But what is Tunnock's? It's a chocolate-coated treat with a biscuit base.

In its survey, the charity found that 61% of cakes, 63% of chocolate confectionery and 44% of biscuits surveyed equalled or exceeded one-third – or 10g – of the daily sugar limit for children.

A food campaign group says schools in England should be banned from giving pupils cakes or biscuits as part of their lunch because they contain too much sugar. Action on Sugar wants the government ...