Children - FSA Weaning Recommendations:
Children under the age of one: Ordinary whole milk isn't suitable as a drink until a baby is a year old. This is because it doesn't contain the right balance of nutrients to meet your baby's needs. Ordinary whole milks (from cows, goats or sheep) can be used for cooking in foods such as cheese sauce and custard from six months.
Children over the age of one: At about a year old, a switch can be made to full-fat milk as a drink.
Children over the age of two: Children should drink whole milk until they are at least two years old because they may not get as many calories as they need from semi-skimmed milk. After the age of two, children can gradually move to semi-skimmed milk as a main drink, as long as they are eating well and getting plenty of calories and nutrients from a varied diet.
Children over the age of five: Don't give skimmed or 1% milk to children until they're at least five years old because it's too low in calories. Skimmed milk contains only very small amounts of vitamin A, which children need.