A human rights campaigner told pupils how to watch out for signs that their friends are being forced into marriage at a talk last week.

Anita Prem spoke to a group of 50 pupils at Haverstock School in Chalk Farm on Friday about her novel But It’s Not Fair.

The book tells the story of schoolgirl Vinny, whose best friend Abby narrowly escapes being forced into marriage.

Pupils at the talk then put on a play for the author and magistrate dealing with the issues raised in the book.

Every year, 15million girls around the world are forced into marriage.

Ms Prem, who is the founder of Freedom Charity, which supports victims of forced marriage and honour violence, donated copies of her book to every pupil.