Lessons incorporating same-sex relationships and transgender issues have resulted in protests outside primary schools, children being removed from classes and head teachers being threatened. BBC News looks back at the origins of the Birmingham LGBT teaching row.

How did it all begin?

The No Outsiders project was the brainchild of Andrew Moffat, assistant head teacher at Parkfield Community School in Birmingham.

Mr Moffat created it to teach children about the Equality Act 2010 and British values. He also wanted pupils to "be proud of who they are while recognising and celebrating difference and diversity".

The project used books about a dog that doesn't feel like it fits in, two male penguins that raise a chick together and a boy who likes to dress up like a mermaid.

"It's about teaching young children that we are different in reception and year one, that's as far as this work goes," he said. "We're just talking about being different and being friends."

In 2014, the project was piloted at his school in the Alum Rock area of the city and was soon adopted by schools across the country.

Three years later, Mr Moffat was made an MBE for services to equality and diversity in education.

When did controversy begin to unfold?

In January this year a parent whose child attends Parkfield school raised a petition, claiming the teaching contradicted the Islamic faith.

"Children at this age don't even know if they are coming or going, let alone knowing what sexual orientation they will become," Mariam Ahmed said. Read more via BBC