A teenage schoolgirl will appeal to the High Court on Friday to overturn a ban on her wearing a "purity ring" at school to symbolize her decision to abstain from sex before marriage.
Lydia Playfoot, 16, from West Sussex, says the silver ring is an expression of her faith and should be exempt from the school's rules on wearing jewellery.
"It is really important to me because in the Bible it says we should do this," she told BBC radio. "Muslims are allowed to wear headscarves and other faiths can wear bangles and other types of jewellery. It feels like Christians are being discriminated against."
Playfoot's lawyers will argue that her right to express religious belief is upheld by the Human Rights Act.
There have been a series of rows in schools in recent years over the right of pupils to wear religious symbols or clothing, such as crucifixes and veils.
Quite simply, wheree would that leave sex education if people were going to reject it's teachings?