Sex education lessons in which pupils as young as eight will be told ‘all genders’ have periods were yesterday condemned as unnecessarily confusing for young children.

The classes follow guidelines that were issued to teachers to help them avoid offending girls who identify as boys.

But critics described the guidelines as inappropriate and another example of political correctness gone mad.

The teacher guidance, from Brighton & Hove City Council, states: ‘Trans boys and men and non-binary people may have periods.’ It says language about menstruation must be inclusive of ‘all genders’ and orders that ‘bins for used period products are provided in all toilets’ for children.

Sex education lessons in which pupils as young as eight will be told ‘all genders’ have periods were yesterday condemned as unnecessarily confusing for young children (stock image)

But Tory MP David Davies described it as ‘insanity’ for teachers to be explaining the concept of transgender boys having periods to eight-year-olds.

‘Learning about periods is already a difficult subject for children that age, so to throw in the idea girls who believe they are boys also have periods will leave them completely confused,’ he added.

Stephanie Davies-Arai, from the campaign group Transgender Trend, said: ‘Girls going through puberty are already having a difficult time. What they should be given is clear language to be able to talk about their bodies and their female biological functions without couching it in politically correct terms.’

And feminist campaigner Julie Bindel said: ‘To tell impressionable children that boys can also menstruate sidelines girls who should be getting support when they start their periods.’

But Tory MP David Davies described it as ‘insanity’ for teachers to be explaining the concept of transgender boys having periods to eight-year-olds (stock image)

The emergence of the guidance comes after it was reported that a state secondary in Brighton has 40 pupils who ‘do not identify as [the] gender presented at birth’.

Earlier this year, The Mail on Sunday revealed how an NHS guidebook stated that males living as women were being invited for tests to check for cervical cancer – even though they do not have a cervix.

Brighton & Hove City Council said last night: ‘By encouraging effective education on menstruation and puberty, we hope to reduce stigma and ensure no child or young person feels shame in asking for period products inside or outside of school if they need them.

‘We believe that it’s important for all genders to be able to learn and talk about menstruation together… Our approach recognises the fact that some people who have periods are trans or non-binary.’