If hooded seals drink the fattiest milk, then tammar wallabies prefer their milk loaded with sugar. It can contain as much as 12% sugar, more than a glass of Coca-Cola, and for good reason.

The company has already introduced a 250 calorie cap on all small chocolate bars, and sells a Dairy Milk bar with 98 calories. Next year it also plans to reduce the amount of sugar in Wine Gums ...