One-fifth of young teenagers in Kingston, Richmond and Roehampton are putting their health at risk by going to school on an empty stomach, a health authority warned yesterday.

A survey of 12 to 14-year-olds in the area's secondary schools showed girls are more likely to leave home without any breakfast and many also miss lunch.

The Kingston and Richmond Health Authority said missing meals and snacking on crisps and sweets is putting youngsters at risk of vitamin and other deficiency diseases.