Rishi Sunak plans to clamp down on inappropriate sex education classes in schools, The Telegraph understands.
The Prime Minister wants to strengthen guidance for teachers on relationships and sex education (RSE) to make sure children are only taught lessons that are age-appropriate.
It comes amid concerns that some schools are contracting sex education out to third-party companies which are exposing youngsters to explicit content and contentious ideas about gender.
Parents would also be given greater rights to request sight of the materials, even if they are provided by a commercial organisation, under the plans.
Current Government guidance on relationships and sex education makes clear that parents should have visibility of what is being taught to their children, such as the books used in lessons.