The teenagers, who describes themselves as “just some intersectional feminists fighting against sexual harassment”, say they are standing up for all victims of gig groping, male and female.

Girls Against was formed after 17-year-old Hannah was assaulted while watching the band Peace in Glasgow in October. She tweeted about her experience, and the band’s lead singer, Harry Koisser, reposted her tweet.

Dozens of other victims began sharing similar personal accounts. The girls realised how widespread the problem was, and the group was born.