If your child has just turned 16, Child Benefit will stop at the end of August. If they remain in approved education, you can apply to get it paid until they are 20. See this article for more details.
Child Benefit Stopping For Some

If your child has just turned 16, Child Benefit will stop at the end of August. If they remain in approved education, you can apply to get it paid until they are 20. See this article for more details.