Children's untreated mental health issues could spiral into psychiatric problems later in life unless more is done in schools, say head teachers.

The National Association of Head Teachers says with a fifth of children having a mental health problem before age 11, it is a key concern.

A snapshot survey of 1,455 English heads suggests two-thirds of primary schools cannot deal with such issues. The government says it has ring-fenced £1.4bn for children's mental health. Russell Hobby, general secretary of the heads' union, NAHT, says: "We know the government is determined to improve children's mental health but there's still a danger that some children will take untreated mental problems into adulthood."

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