Primary school children from the age of five are to be taught about gay and transgender relationships as part of compulsory lessons.

Guidance about the new lessons, which will be rolled out nationally next year, will be published tomorrow.

It will also outline plans to withdraw parents' rights to remove their children from sex education aged 15 from 2020.

Primary school children are to be taught about gay and transgender relationships as part of compulsory lessons. Stock picture of a classroom

New curriculum will bring an end of parents’ right to opt their children out of sex and relationships education classes in secondary school .

Children are guaranteed to receive at least a term of lessons by the time they are 16, as part if the new curriculum which is being brought in by education secretary Damian Hinds.

When the new lessons are rolled out next year, headteachers will be forced to bring them in, The Sunday Times reported.

As part of the changes, secondary school children will receive at least one compulsory term of sex ed lessons by age 16, including lessons on the damage caused by female genital mutilation .

Sexting, online grooming, domestic violence and forced marriage will also be put under the spotlight.

The announcement comes after more than 300 parents and children gathered outside of a primary school yesterday to protest against lessons on homosexuality and gender.

Some Muslim demonstrators said they would rather leave the UK than allow their children to continue attending Parkfield Community School in Birmingham. Parkfield Community School has said it wants pupils to be 'accepting and to welcome anybody'

Muslim demonstrators said they would rather leave the UK than allow their children to continue attending Parkfield Community School in Birmingham, West Midlands.

Parents' anger is aimed at the school's assistant head Andrew Moffat, who is behind the 'No Outsiders' lessons. He created the scheme to teach children about the Equality Act and British values.

Pupils at the school have five of these lessons a year, covering areas outlined in the Act: age, disability, gender reassignment, marriage and civil partnership, pregnancy or maternity, race, religion or belief, sex and sexual orientation.

However, the school is expected to be backed by Ofsted this week when the school is again handed its highest rating.

Tomorrow a petition signed by more than 100,000 people objecting to the sex and relationships curriculum will be debated in parliament.

Parents' anger is aimed at the school's assistant head Andrew Moffat, who is behind the 'No Outsiders' lessons. He created the scheme to teach children about the Equality Act and British values.

Pupils at the school – rated outstanding by Ofsted – have five of these lessons a year, covering areas outlined in the Act: age, disability, gender reassignment, marriage and civil partnership, pregnancy or maternity, race, religion or belief, sex and sexual orientation.